manual: Combine overview.pdf and the user manual.
authorAndre Noll <maan@tuebingen.mpg.de>
Sat, 29 Apr 2017 02:33:17 +0000 (04:33 +0200)
committerAndre Noll <maan@tuebingen.mpg.de>
Sun, 21 May 2017 15:41:42 +0000 (17:41 +0200)
The figures of the overview.pdf file look rather odd although they
used to look better when they were created four years ago. Apparently,
the dia command line tool which creates the pdf from the .dia source
file has changed and now messes up the lines which connect the parts
of the figure.

This commit re-implements four out of the five figures of the overview
file as ascii art in manual.md, removes overview.dia, and modifies
the documentation web page to no longer refer to the dia version.

The text of the overview file has been merged with the manual and
got improved a bit.

dia sucks.

web/dia/overview.dia [deleted file]
web/documentation.in.html
web/manual.md

diff --git a/web/dia/overview.dia b/web/dia/overview.dia
deleted file mode 100644 (file)
index f9e0158..0000000
+++ /dev/null
@@ -1,3817 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<dia:diagram xmlns:dia="http://www.lysator.liu.se/~alla/dia/">
-  <dia:diagramdata>
-    <dia:attribute name="background">
-      <dia:color val="#ffffff"/>
-    </dia:attribute>
-    <dia:attribute name="pagebreak">
-      <dia:color val="#000099"/>
-    </dia:attribute>
-    <dia:attribute name="paper">
-      <dia:composite type="paper">
-        <dia:attribute name="name">
-          <dia:string>#A4#</dia:string>
-        </dia:attribute>
-        <dia:attribute name="tmargin">
-          <dia:real val="2.8222000598907471"/>
-        </dia:attribute>
-        <dia:attribute name="bmargin">
-          <dia:real val="2.8222000598907471"/>
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-        <dia:attribute name="lmargin">
-          <dia:real val="2.8222000598907471"/>
-        </dia:attribute>
-        <dia:attribute name="rmargin">
-          <dia:real val="2.8222000598907471"/>
-        </dia:attribute>
-        <dia:attribute name="is_portrait">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="scaling">
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="fitto">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-      </dia:composite>
-    </dia:attribute>
-    <dia:attribute name="grid">
-      <dia:composite type="grid">
-        <dia:attribute name="width_x">
-          <dia:real val="1"/>
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-        <dia:attribute name="width_y">
-          <dia:real val="1"/>
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-        <dia:attribute name="visible_x">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="visible_y">
-          <dia:int val="1"/>
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-        <dia:composite type="color"/>
-      </dia:composite>
-    </dia:attribute>
-    <dia:attribute name="color">
-      <dia:color val="#d8e5e5"/>
-    </dia:attribute>
-    <dia:attribute name="guides">
-      <dia:composite type="guides">
-        <dia:attribute name="hguides"/>
-        <dia:attribute name="vguides"/>
-      </dia:composite>
-    </dia:attribute>
-  </dia:diagramdata>
-  <dia:layer name="Background" visible="true" active="true">
-    <dia:object type="Standard - Text" version="1" id="O0">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.13505,-23.1314"/>
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-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.13505,-23.7264;3.15255,-22.9789"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#Overview#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.13505,-23.1314"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O1">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.1367,0.8291"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.1367,0.2341;3.9392,0.9816"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_server#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.1367,0.8291"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O2">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.225,9.8561"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.213438,9.47704;14.6275,15.9009"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#Incoming connections arrive via TCP at the dispatcher which creates a
-command handler process for each connection.
-
-After the connecting client has been authenticated, the command
-handler propagates the incoming request either to the audio file
-selector (afs) or to the virtual streaming system (vss). Results are sent
-back to the client.
-
-afs maintans the audio file database and  is responsible for selecting
-and loading audio files while vss controls the paraslash senders. When
-vss needs to stream an audio file it requests an open file descriptor from
-afs and feeds small chunks of data (e.g. mp3 frames) to the senders
-which send the chunks to all connected clients.#</dia:string>
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-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.225,9.8561"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O3">
-      <dia:attribute name="obj_pos">
-        <dia:point val="3.1702,14.0975"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="3.1702,13.5025;3.1702,14.25"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
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-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="3.1702,14.0975"/>
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-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:group>
-      <dia:object type="Network - Bus" version="0" id="O4">
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-          <dia:point val="6.3534,2.3542"/>
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-          <dia:rectangle val="3.58996,2.30409;11.989,6.1401"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="6.3534,2.3542"/>
-          <dia:point val="11.9389,2.3663"/>
-        </dia:attribute>
-        <dia:attribute name="line_color">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="bus_handles">
-          <dia:point val="5.21003,3.2968"/>
-          <dia:point val="3.6399,2.3744"/>
-          <dia:point val="7.88141,3.2968"/>
-          <dia:point val="10.175,6.1401"/>
-          <dia:point val="8.92435,3.44756"/>
-          <dia:point val="6.83847,3.44756"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="2" to="O9" connection="11"/>
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-          <dia:connection handle="5" to="O12" connection="11"/>
-          <dia:connection handle="6" to="O10" connection="3"/>
-          <dia:connection handle="7" to="O10" connection="6"/>
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-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O5">
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-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
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-        <dia:connections>
-          <dia:connection handle="0" to="O9" connection="8"/>
-          <dia:connection handle="1" to="O12" connection="5"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - ZigZagLine" version="1" id="O7">
-        <dia:attribute name="obj_pos">
-          <dia:point val="10.175,7.62192"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="5.16006,7.28325;10.225,8.0832"/>
-        </dia:attribute>
-        <dia:attribute name="orth_points">
-          <dia:point val="10.175,7.62192"/>
-          <dia:point val="10.175,8.0332"/>
-          <dia:point val="5.21006,8.0332"/>
-          <dia:point val="5.21006,7.33325"/>
-        </dia:attribute>
-        <dia:attribute name="orth_orient">
-          <dia:enum val="1"/>
-          <dia:enum val="0"/>
-          <dia:enum val="1"/>
-        </dia:attribute>
-        <dia:attribute name="autorouting">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O12" connection="2"/>
-          <dia:connection handle="1" to="O13" connection="2"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Network - Storage" version="1" id="O8">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.7175,4.4993"/>
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-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.6675,4.4493;5.75257,6.51078"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="4.7175,4.4993"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="0.9850649999999993"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.1588999999999992"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#cccccc"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>##</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.80010001542891407"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.21003,6.25828"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O9">
-        <dia:attribute name="obj_pos">
-          <dia:point val="3.86929,3.2968"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="3.81929,3.2468;6.60076,4.25135"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="3.86929,3.2968"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.6814705898130646"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.90454545953539145"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#dispatcher#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.21003,3.88136"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O10">
-        <dia:attribute name="obj_pos">
-          <dia:point val="6.83847,3.2968"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="6.78847,3.2468;8.97435,4.25135"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="6.83847,3.2968"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.0858823545189464"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.90454545953538812"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#senders#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="7.88141,3.88136"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O11">
-        <dia:attribute name="obj_pos">
-          <dia:point val="7.35748,6.4287"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="7.30748,6.3787;8.45572,7.38325"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="7.35748,6.4287"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="1.0482352956954173"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.90454545953538545"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#vss#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="7.8816,7.01326"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O12">
-        <dia:attribute name="obj_pos">
-          <dia:point val="8.8978,6.1401"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="8.8478,6.0901;11.5022,7.67192"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="8.8978,6.1401"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.5544117662836525"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.4818181901724667"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#command
-handler#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="10.175,6.74872"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O13">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.71771,6.4287"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.66771,6.3787;5.75242,7.38325"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="4.71771,6.4287"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="0.98470588393071123"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.90454545953538301"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#afs#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.21006,7.01326"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O14">
-        <dia:attribute name="obj_pos">
-          <dia:point val="7.8816,6.4287"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="7.83141,4.15135;7.9316,6.4787"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="7.8816,6.4287"/>
-          <dia:point val="7.88141,4.20135"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O11" connection="11"/>
-          <dia:connection handle="1" to="O10" connection="2"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O15">
-        <dia:attribute name="obj_pos">
-          <dia:point val="8.3766,6.88097"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="8.3266,6.83097;9.0828,6.93101"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="8.3766,6.88097"/>
-          <dia:point val="9.0328,6.88101"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O11" connection="5"/>
-          <dia:connection handle="1" to="O12" connection="8"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O16">
-        <dia:attribute name="obj_pos">
-          <dia:point val="5.66933,6.88097"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="5.61933,6.83097;7.4366,6.93097"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="5.66933,6.88097"/>
-          <dia:point val="7.3866,6.88097"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O13" connection="5"/>
-          <dia:connection handle="1" to="O11" connection="8"/>
-        </dia:connections>
-      </dia:object>
-    </dia:group>
-    <dia:object type="Network - An amplifier speaker" version="1" id="O17">
-      <dia:attribute name="obj_pos">
-        <dia:point val="9.8398,-22.1251"/>
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-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="9.7898,-22.1751;11.2046,-19.4456"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="9.8398,-22.1251"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="1.314752411332281"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="2.6295048226645621"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
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-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Network - General Monitor (With Stand)" version="1" id="O18">
-      <dia:attribute name="obj_pos">
-        <dia:point val="3.20424,-21.8387"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="3.19174,-21.8512;5.40635,-18.76"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="3.20424,-21.8387"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="2.1896140767718091"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="2.1531205088256122"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.05000000074505806"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80010001542891407"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="4.29905,-19.0125"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O19">
-      <dia:attribute name="obj_pos">
-        <dia:point val="11.7649,-16.3593"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="11.7144,-16.4098;12.6724,-16.2995"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="11.7649,-16.3593"/>
-        <dia:point val="12.6218,-16.35"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O20" connection="5"/>
-        <dia:connection handle="1" to="O35" connection="2"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O20">
-      <dia:attribute name="obj_pos">
-        <dia:point val="9.08475,-16.8116"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="9.03475,-16.8616;11.9353,-15.8571"/>
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-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="9.08475,-16.8116"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="2.8005882368718877"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="0.90454545953538812"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#bbe7bb"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
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-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_server#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="10.485,-16.2359"/>
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-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
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-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O21">
-      <dia:attribute name="obj_pos">
-        <dia:point val="9.03812,-18.5769"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="8.98812,-18.6269;11.9893,-17.6608"/>
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-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
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-      <dia:attribute name="elem_corner">
-        <dia:point val="9.03812,-18.5769"/>
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-      <dia:attribute name="elem_width">
-        <dia:real val="2.9011764721660049"/>
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-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082624863"/>
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-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
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-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#bbe7bb"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
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-      <dia:attribute name="line_style">
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-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_audiod#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
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-          <dia:attribute name="pos">
-            <dia:point val="10.4887,-18.0204"/>
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-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
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-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
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-        </dia:composite>
-      </dia:attribute>
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-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
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-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O22">
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-        <dia:point val="5.75078,-18.5644"/>
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-      <dia:attribute name="meta">
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-      <dia:attribute name="elem_corner">
-        <dia:point val="5.75078,-18.5644"/>
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-      <dia:attribute name="elem_width">
-        <dia:real val="2.8667647074601228"/>
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-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082624919"/>
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-        <dia:real val="0.10000000149011612"/>
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-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
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-        <dia:color val="#ffffff"/>
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-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
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-      <dia:attribute name="padding">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_audioc#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
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-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
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-          <dia:attribute name="pos">
-            <dia:point val="7.18416,-18.0079"/>
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-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
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-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
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-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O23">
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-      <dia:attribute name="meta">
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-      <dia:attribute name="elem_corner">
-        <dia:point val="6.01211,-21.1907"/>
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-      <dia:attribute name="elem_width">
-        <dia:real val="2.369117647058824"/>
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-      <dia:attribute name="elem_height">
-        <dia:real val="0.8660606108262402"/>
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-        <dia:real val="0.10000000149011612"/>
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-        <dia:color val="#000000"/>
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-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
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-      <dia:attribute name="show_background">
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-      <dia:attribute name="padding">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_gui#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
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-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
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-          <dia:attribute name="pos">
-            <dia:point val="7.19667,-20.6342"/>
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-            <dia:color val="#000000"/>
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-            <dia:enum val="1"/>
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-        <dia:real val="1"/>
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-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O24">
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-      <dia:attribute name="meta">
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-        <dia:point val="2.98001,-16.8019"/>
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-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082625097"/>
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-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
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-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
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-      <dia:attribute name="show_background">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_client#</dia:string>
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-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
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-          <dia:attribute name="height">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
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-            <dia:point val="1.575,-10.6689"/>
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="3.6375,10.9686"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O33">
-      <dia:attribute name="obj_pos">
-        <dia:point val="2.6375,10.6686"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="2.6375,10.0736;2.6375,10.8211"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="2.6375,10.6686"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O34">
-      <dia:attribute name="obj_pos">
-        <dia:point val="4.29295,-16.8019"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="4.24287,-19.7231;4.34745,-16.7518"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="4.29295,-16.8019"/>
-        <dia:point val="4.29737,-19.673"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O24" connection="11"/>
-        <dia:connection handle="1" to="O18" connection="1"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="Network - Storage" version="1" id="O35">
-      <dia:attribute name="obj_pos">
-        <dia:point val="12.6719,-16.9342"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="12.6219,-16.9842;13.7267,-15.1866"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="12.6719,-16.9342"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="1.0048306811423449"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="1.1821537425204058"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#cccccc"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>##</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="13.1743,-15.3816"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O36">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.171225,-14.4141"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.159662,-14.7932;14.6787,-7.87542"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#The two main applications of the paraslash suite (shaded green) are
-para_server and para_audiod. Both run in the background usually.
-para_server maintains the audio file database and acts as the streaming
-source, while para_audiod is the streaming client.
-
-The two client programs, para_client and para_audioc communicate
-with para_server and para_audiod, respectively.
-
-para_gui controls para_server/audiod by executing paraslash commands.
-Command output is shown in a curses window. para_gui automatically
-executes para_audioc to obtain the state of para_audiod and para_server
-and the metadata of the current audio file.
-
-Network connections are shaded grey, local connections black.#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.171225,-14.4141"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O37">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.1003,73.0082"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.1003,72.4132;4.0578,73.1607"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_audiod#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.1003,73.0082"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O38">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.116202,82.0061"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.116202,81.627;14.5828,87.0631"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#The purpose of para_audiod is to download, decode and play an audio
-stream received from para_server. It fetches the para_server status and
-starts a suitable buffer tree (shaded blue) if an audio stream is available.
-
-The buffer tree usually consists of a receiver, any number of filters and
-a writer. The receiver downloads the audio stream from para_server and
-the filters decode or modify the received data. The writer plays the
-decoded stream.
-
-The dispatcher acts on (local) requests from para_audioc, for example to
-dump information about the current audio file.#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.116202,82.0061"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O39">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.27019,32.9375"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.258628,32.5584;13.8202,37.5006"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#The audio file selector (afs) accepts two different kinds of incoming
-connections: A bidirectional pipe shared with para_server is used for
-passing the file descriptor of the current audio file to the server
-process. The local socket is used by command handlers which query
-or update the database.
-
-To add a new file to the database, afs opens the file and locates an
-audio format handler (afh) that recognizes the file. A new database
-entry with metadata obtained from the afh is then added to the
-database.#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.27019,32.9375"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O40">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.11118,24.9782"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.11118,24.3832;7.22118,25.1307"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#The audio file selector#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.11118,24.9782"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O41">
-      <dia:attribute name="obj_pos">
-        <dia:point val="6.8012,28.9591"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="5.61907,28.9091;6.85122,29.0096"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="6.8012,28.9591"/>
-        <dia:point val="5.66909,28.9596"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="4"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O50" connection="8"/>
-        <dia:connection handle="1" to="O43" connection="2"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O42">
-      <dia:attribute name="obj_pos">
-        <dia:point val="7.6012,28.5261"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="7.53094,27.1956;9.25521,28.5964"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="7.6012,28.5261"/>
-        <dia:point val="9.18495,27.2659"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O50" connection="10"/>
-        <dia:connection handle="1" to="O47" connection="0"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="Network - Storage" version="1" id="O43">
-      <dia:attribute name="obj_pos">
-        <dia:point val="4.61551,28.3687"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="4.00418,28.3187;6.23168,30.1163"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="4.61551,28.3687"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="1.0048306811423449"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="1.1821537425204058"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#cccccc"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#audio files#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="5.11793,29.9213"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O44">
-      <dia:attribute name="obj_pos">
-        <dia:point val="7.2512,28.5261"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="7.19859,26.8922;7.30128,28.5762"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="7.2512,28.5261"/>
-        <dia:point val="7.24867,26.9423"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O50" connection="11"/>
-        <dia:connection handle="1" to="O46" connection="2"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O45">
-      <dia:attribute name="obj_pos">
-        <dia:point val="7.2512,29.3922"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="7.20042,29.3414;7.32552,30.9457"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="7.2512,29.3922"/>
-        <dia:point val="7.27474,30.8949"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O50" connection="2"/>
-        <dia:connection handle="1" to="O49" connection="11"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O46">
-      <dia:attribute name="obj_pos">
-        <dia:point val="5.84838,26.0762"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="5.79838,26.0262;8.69897,26.9923"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="5.84838,26.0762"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="2.8005882368718877"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082624941"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#bbe7bb"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#para_server#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="7.24867,26.6327"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O47">
-      <dia:attribute name="obj_pos">
-        <dia:point val="9.04127,26.3998"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="8.99127,26.3498;10.0786,27.3159"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="9.04127,26.3998"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="0.98735294275424068"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082625274"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#afh#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="9.53495,26.9563"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Network - Storage" version="1" id="O48">
-      <dia:attribute name="obj_pos">
-        <dia:point val="8.84318,28.3795"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="8.65435,28.3295;10.0368,30.1271"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="8.84318,28.3795"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="1.0048306811423449"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="1.1821537425204058"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#cccccc"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#osl db#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="9.3456,29.9321"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O49">
-      <dia:attribute name="obj_pos">
-        <dia:point val="5.20738,30.8949"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="5.15738,30.8449;9.39209,31.811"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="5.20738,30.8949"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="4.1347058839307111"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082624874"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#command handler#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="7.27474,31.4514"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="BPMN - Task" version="1" id="O50">
-      <dia:attribute name="obj_pos">
-        <dia:point val="6.78135,28.5261"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="6.73135,28.4761;7.77105,29.4422"/>
-      </dia:attribute>
-      <dia:attribute name="meta">
-        <dia:composite type="dict"/>
-      </dia:attribute>
-      <dia:attribute name="elem_corner">
-        <dia:point val="6.78135,28.5261"/>
-      </dia:attribute>
-      <dia:attribute name="elem_width">
-        <dia:real val="0.93970588393071131"/>
-      </dia:attribute>
-      <dia:attribute name="elem_height">
-        <dia:real val="0.86606061082625274"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:attribute name="line_colour">
-        <dia:color val="#000000"/>
-      </dia:attribute>
-      <dia:attribute name="fill_colour">
-        <dia:color val="#ffffff"/>
-      </dia:attribute>
-      <dia:attribute name="show_background">
-        <dia:boolean val="true"/>
-      </dia:attribute>
-      <dia:attribute name="line_style">
-        <dia:enum val="0"/>
-        <dia:real val="1"/>
-      </dia:attribute>
-      <dia:attribute name="padding">
-        <dia:real val="0.10000000000000001"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#afs#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="7.2512,29.0826"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="1"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="flip_horizontal">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="flip_vertical">
-        <dia:boolean val="false"/>
-      </dia:attribute>
-      <dia:attribute name="subscale">
-        <dia:real val="1"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Line" version="0" id="O51">
-      <dia:attribute name="obj_pos">
-        <dia:point val="7.7012,28.9591"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="7.65087,28.9088;8.844,29.0167"/>
-      </dia:attribute>
-      <dia:attribute name="conn_endpoints">
-        <dia:point val="7.7012,28.9591"/>
-        <dia:point val="8.79367,28.9663"/>
-      </dia:attribute>
-      <dia:attribute name="numcp">
-        <dia:int val="1"/>
-      </dia:attribute>
-      <dia:attribute name="line_width">
-        <dia:real val="0.10000000149011612"/>
-      </dia:attribute>
-      <dia:connections>
-        <dia:connection handle="0" to="O50" connection="5"/>
-        <dia:connection handle="1" to="O48" connection="2"/>
-      </dia:connections>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O52">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.1025,49.0569"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.1025,48.4619;5.9375,49.2094"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#The OSL database#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.80000000000000004"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.1025,49.0569"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O53">
-      <dia:attribute name="obj_pos">
-        <dia:point val="0.2206,58.055"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="0.209037,57.6759;14.1806,68.0509"/>
-      </dia:attribute>
-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#Metadata about all known audio files is stored in serveral tables of a
-database which is driven by libosl, the object storage layer library.
-
-The "audio files" table is the main table of the database. It contains
-path, hash and metadata of each known file.
-
-The "attributes" table maps each of the 64 possible attributes to a
-string. The attribute value of the file's metadata is translated through
-this table.
-
-The tables shown shaded are blob tables which support add, rm, mv,
-cat, ls commands. All of these are optional.
-
-The "score" table describes the subset of admissible files for the
-current playlist or mood. This table is created on demand, resides
-only in memory and is discarded on exit.
-
-When the next audio file is to be streamed, the audio file selector gets
-the entry with the highest score from the "score" table, obtains path,
-hash, and metadata for this entry from the "audio files" table, opens
-the path and verifies the hash.#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
-          </dia:attribute>
-          <dia:attribute name="height">
-            <dia:real val="0.49388889176727813"/>
-          </dia:attribute>
-          <dia:attribute name="pos">
-            <dia:point val="0.2206,58.055"/>
-          </dia:attribute>
-          <dia:attribute name="color">
-            <dia:color val="#000000"/>
-          </dia:attribute>
-          <dia:attribute name="alignment">
-            <dia:enum val="0"/>
-          </dia:attribute>
-        </dia:composite>
-      </dia:attribute>
-      <dia:attribute name="valign">
-        <dia:enum val="3"/>
-      </dia:attribute>
-    </dia:object>
-    <dia:group>
-      <dia:object type="Flowchart - Extract" version="1" id="O54">
-        <dia:attribute name="obj_pos">
-          <dia:point val="2.048,53.4404"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="1.88598,53.3799;6.86502,55.0782"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="2.048,53.4404"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="4.6550000029802332"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.5877777865147884"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#audio files#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="4.3755,54.7547"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O55">
-        <dia:attribute name="obj_pos">
-          <dia:point val="9.0846,55.0212"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="8.94554,54.9564;13.0687,56.659"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="9.0846,55.0212"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="3.8450000029802323"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.5877777865147775"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#cccccc"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#playlists#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="11.0071,56.3355"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O56">
-        <dia:attribute name="obj_pos">
-          <dia:point val="5.9317,52.7104"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="5.803,52.6426;9.5304,54.3482"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="5.9317,52.7104"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="3.4700000029802327"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.5877777865147873"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#cccccc"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#images#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="7.6667,54.0247"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O57">
-        <dia:attribute name="obj_pos">
-          <dia:point val="6.8382,50.5875"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="6.68191,50.5261;11.4495,52.2253"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="6.8382,50.5875"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="4.4550000029802321"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.587777786514786"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#attributes#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="9.0657,51.9018"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O58">
-        <dia:attribute name="obj_pos">
-          <dia:point val="9.7265,52.7977"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="9.61888,52.7202;12.5141,54.4355"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="9.7265,52.7977"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.6800000029802327"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.5877777865147884"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#cccccc"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#lyrics#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="11.0665,54.112"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O59">
-        <dia:attribute name="obj_pos">
-          <dia:point val="5.4821,55.0581"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="5.35938,54.9882;8.85482,56.6959"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="5.4821,55.0581"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="3.2500000029802325"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.58777778651479"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#cccccc"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#moods#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="7.1071,56.3724"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Flowchart - Extract" version="1" id="O60">
-        <dia:attribute name="obj_pos">
-          <dia:point val="2.4988,50.5557"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="2.35946,50.4909;6.49314,52.1935"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="2.4988,50.5557"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="3.855000002980232"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.587777786514786"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="4"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#score#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="4.4263,51.87"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O61">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.41144,52.1937"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.33898,52.1428;4.46231,53.4702"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="4.41144,52.1937"/>
-          <dia:point val="4.38985,53.4194"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O60" connection="12"/>
-          <dia:connection handle="1" to="O54" connection="12"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O62">
-        <dia:attribute name="obj_pos">
-          <dia:point val="5.03792,53.8314"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.96922,52.1555;7.74887,53.9001"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="5.03792,53.8314"/>
-          <dia:point val="7.68017,52.2242"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O54" connection="12"/>
-          <dia:connection handle="1" to="O57" connection="12"/>
-        </dia:connections>
-      </dia:object>
-    </dia:group>
-    <dia:group>
-      <dia:object type="BPMN - Task" version="1" id="O63">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.42569,77.8748"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.37569,77.8248;7.15716,78.8293"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="4.42569,77.8748"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.6814705898130642"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.90454545953538923"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#dispatcher#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.76643,78.4594"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O64">
-        <dia:attribute name="obj_pos">
-          <dia:point val="1.63592,76.2823"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="1.58592,76.2323;5.11916,77.2368"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="1.63592,76.2823"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="3.4332352956954173"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.9045454595353889"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#status fetcher#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.52916666975065518"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="3.35254,76.8669"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Network - An amplifier speaker" version="1" id="O65">
-        <dia:attribute name="obj_pos">
-          <dia:point val="11.9716,75.7366"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="11.9216,75.6866;13.0196,77.7826"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="11.9716,75.7366"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="0.99802008040072598"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="1.996040160801452"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#ffffff"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O66">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.31303,74.415"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.26303,74.365;7.16362,75.3311"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="4.31303,74.415"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.8005882368718877"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.8660606108262453"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#bbe7bb"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#para_server#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.71332,74.9715"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O67">
-        <dia:attribute name="obj_pos">
-          <dia:point val="7.11064,76.3016"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="7.06064,76.2516;9.18034,77.2177"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="7.11064,76.3016"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.0197058839307109"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.86606061082625108"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#bbbbee"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#receiver#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="8.12049,76.8581"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O68">
-        <dia:attribute name="obj_pos">
-          <dia:point val="9.56352,76.3016"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="9.51352,76.2516;11.1726,77.2177"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="9.56352,76.3016"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="1.5591176486365934"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.86606061082625141"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#bbbbee"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#filter1#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="10.3431,76.8581"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O69">
-        <dia:attribute name="obj_pos">
-          <dia:point val="9.48684,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="9.43684,78.3514;11.2283,79.3175"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="9.48684,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="1.691470589813064"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.86606061082625141"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#bbbbee"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#filter 2#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="10.3326,78.9579"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O70">
-        <dia:attribute name="obj_pos">
-          <dia:point val="11.6997,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="11.6497,78.3514;13.2903,79.3175"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="11.6997,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="1.5405882368718877"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.86606061082624797"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#bbbbee"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#writer#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="12.47,78.9579"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="BPMN - Task" version="1" id="O71">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.32709,79.7644"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="4.27709,79.7144;7.24386,80.6805"/>
-        </dia:attribute>
-        <dia:attribute name="meta">
-          <dia:composite type="dict"/>
-        </dia:attribute>
-        <dia:attribute name="elem_corner">
-          <dia:point val="4.32709,79.7644"/>
-        </dia:attribute>
-        <dia:attribute name="elem_width">
-          <dia:real val="2.8667647074601228"/>
-        </dia:attribute>
-        <dia:attribute name="elem_height">
-          <dia:real val="0.86606061082624586"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:attribute name="line_colour">
-          <dia:color val="#000000"/>
-        </dia:attribute>
-        <dia:attribute name="fill_colour">
-          <dia:color val="#888888"/>
-        </dia:attribute>
-        <dia:attribute name="show_background">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_style">
-          <dia:enum val="0"/>
-          <dia:real val="1"/>
-        </dia:attribute>
-        <dia:attribute name="padding">
-          <dia:real val="0.10000000000000001"/>
-        </dia:attribute>
-        <dia:attribute name="text">
-          <dia:composite type="text">
-            <dia:attribute name="string">
-              <dia:string>#para_audioc#</dia:string>
-            </dia:attribute>
-            <dia:attribute name="font">
-              <dia:font family="sans" style="0" name="Helvetica"/>
-            </dia:attribute>
-            <dia:attribute name="height">
-              <dia:real val="0.49388889176727813"/>
-            </dia:attribute>
-            <dia:attribute name="pos">
-              <dia:point val="5.76047,80.3209"/>
-            </dia:attribute>
-            <dia:attribute name="color">
-              <dia:color val="#000000"/>
-            </dia:attribute>
-            <dia:attribute name="alignment">
-              <dia:enum val="1"/>
-            </dia:attribute>
-          </dia:composite>
-        </dia:attribute>
-        <dia:attribute name="flip_horizontal">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="flip_vertical">
-          <dia:boolean val="false"/>
-        </dia:attribute>
-        <dia:attribute name="subscale">
-          <dia:real val="1"/>
-        </dia:attribute>
-      </dia:object>
-      <dia:object type="Standard - ZigZagLine" version="1" id="O72">
-        <dia:attribute name="obj_pos">
-          <dia:point val="7.11362,74.848"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="7.06362,74.798;8.17049,76.3516"/>
-        </dia:attribute>
-        <dia:attribute name="orth_points">
-          <dia:point val="7.11362,74.848"/>
-          <dia:point val="8.12049,74.848"/>
-          <dia:point val="8.12049,76.3016"/>
-        </dia:attribute>
-        <dia:attribute name="orth_orient">
-          <dia:enum val="0"/>
-          <dia:enum val="1"/>
-        </dia:attribute>
-        <dia:attribute name="autorouting">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_color">
-          <dia:color val="#888888"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O66" connection="5"/>
-          <dia:connection handle="1" to="O67" connection="11"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - ZigZagLine" version="1" id="O73">
-        <dia:attribute name="obj_pos">
-          <dia:point val="4.31303,74.848"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="3.26303,73.798;4.36303,76.3323"/>
-        </dia:attribute>
-        <dia:attribute name="orth_points">
-          <dia:point val="4.31303,74.848"/>
-          <dia:point val="3.31303,74.848"/>
-          <dia:point val="3.31303,73.848"/>
-          <dia:point val="3.35254,73.848"/>
-          <dia:point val="3.35254,76.2823"/>
-        </dia:attribute>
-        <dia:attribute name="orth_orient">
-          <dia:enum val="0"/>
-          <dia:enum val="1"/>
-          <dia:enum val="0"/>
-          <dia:enum val="1"/>
-        </dia:attribute>
-        <dia:attribute name="autorouting">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_color">
-          <dia:color val="#888888"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O66" connection="8"/>
-          <dia:connection handle="1" to="O64" connection="11"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - ZigZagLine" version="1" id="O74">
-        <dia:attribute name="obj_pos">
-          <dia:point val="3.35254,77.1868"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="3.30254,77.1368;4.47569,78.3771"/>
-        </dia:attribute>
-        <dia:attribute name="orth_points">
-          <dia:point val="3.35254,77.1868"/>
-          <dia:point val="3.35254,78.3271"/>
-          <dia:point val="4.42569,78.3271"/>
-        </dia:attribute>
-        <dia:attribute name="orth_orient">
-          <dia:enum val="1"/>
-          <dia:enum val="0"/>
-        </dia:attribute>
-        <dia:attribute name="autorouting">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O64" connection="2"/>
-          <dia:connection handle="1" to="O63" connection="8"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - ZigZagLine" version="1" id="O75">
-        <dia:attribute name="obj_pos">
-          <dia:point val="7.10716,78.3271"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="7.05716,77.1177;8.17049,78.3771"/>
-        </dia:attribute>
-        <dia:attribute name="orth_points">
-          <dia:point val="7.10716,78.3271"/>
-          <dia:point val="8.12049,78.3271"/>
-          <dia:point val="8.12049,77.1677"/>
-        </dia:attribute>
-        <dia:attribute name="orth_orient">
-          <dia:enum val="0"/>
-          <dia:enum val="1"/>
-        </dia:attribute>
-        <dia:attribute name="autorouting">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O63" connection="5"/>
-          <dia:connection handle="1" to="O67" connection="2"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O76">
-        <dia:attribute name="obj_pos">
-          <dia:point val="5.76643,78.7793"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="5.71017,78.729;5.81673,79.8147"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="5.76643,78.7793"/>
-          <dia:point val="5.76047,79.7644"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O63" connection="2"/>
-          <dia:connection handle="1" to="O71" connection="11"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O77">
-        <dia:attribute name="obj_pos">
-          <dia:point val="9.02049,76.7346"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="8.97049,76.6846;9.71808,76.7846"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="9.02049,76.7346"/>
-          <dia:point val="9.66808,76.7346"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O67" connection="5"/>
-          <dia:connection handle="1" to="O68" connection="8"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O78">
-        <dia:attribute name="obj_pos">
-          <dia:point val="10.3431,77.1677"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="10.2822,77.1173;10.3935,78.4518"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="10.3431,77.1677"/>
-          <dia:point val="10.3326,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O68" connection="2"/>
-          <dia:connection handle="1" to="O69" connection="11"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O79">
-        <dia:attribute name="obj_pos">
-          <dia:point val="12.4706,77.7326"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="12.42,77.6826;12.5206,78.4514"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="12.4706,77.7326"/>
-          <dia:point val="12.47,78.4014"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O65" connection="2"/>
-          <dia:connection handle="1" to="O70" connection="11"/>
-        </dia:connections>
-      </dia:object>
-      <dia:object type="Standard - Line" version="0" id="O80">
-        <dia:attribute name="obj_pos">
-          <dia:point val="11.0658,78.8344"/>
-        </dia:attribute>
-        <dia:attribute name="obj_bb">
-          <dia:rectangle val="11.0158,78.7844;11.849,78.8844"/>
-        </dia:attribute>
-        <dia:attribute name="conn_endpoints">
-          <dia:point val="11.0658,78.8344"/>
-          <dia:point val="11.799,78.8344"/>
-        </dia:attribute>
-        <dia:attribute name="numcp">
-          <dia:int val="1"/>
-        </dia:attribute>
-        <dia:attribute name="line_width">
-          <dia:real val="0.10000000149011612"/>
-        </dia:attribute>
-        <dia:connections>
-          <dia:connection handle="0" to="O69" connection="5"/>
-          <dia:connection handle="1" to="O70" connection="8"/>
-        </dia:connections>
-      </dia:object>
-    </dia:group>
-  </dia:layer>
-</dia:diagram>
index 9e8b59c..d6d690a 100644 (file)
@@ -5,12 +5,6 @@
 <h2> General information </h2>
 
 <ul>
-       <li> <a href="overview.pdf">overview.pdf</a>,
-
-               a pdf file containing a sketch which illustrates how
-               the pieces of paraslash work together.
-
-       </li>
        <li> <a href="manual.html">user manual</a>,
                Installation, Configuration and Usage.
        </li>
index 0218ad5..c8f1a9d 100644 (file)
@@ -12,48 +12,71 @@ paraslash executable.
 Introduction
 ============
 
-In this chapter we give an [overview](#Overview) of the interactions of
-the two main programs contained in the paraslash package, followed by
+In this chapter we give an [overview](#Overview) of the interactions
+of the programs contained in the paraslash package, followed by
 [brief descriptions](#The.paraslash.executables) of all executables.
 
 Overview
 --------
 
 The core functionality of the para suite is provided by two main
-executables, para_server and para_audiod. The former maintains a
-database of audio files and streams these files to para_audiod which
-receives and plays the stream.
-
-In a typical setting, both para_server and para_audiod act as
-background daemons whose functionality is controlled by client
-programs: the para_audioc client controls para_audiod over a local
-socket while the para_client program connects to para_server over a
-local or remote networking connection.
-
-Typically, these two daemons run on different hosts but a local setup
-is also possible.
+applications, para_server and para_audiod. para_server maintains
+the audio file database and acts as the streaming source, while
+para_audiod is the streaming client. Usually, both run in the
+background on different hosts but a local setup is also possible.
 
 A simplified picture of a typical setup is as follows
 
-       server_host                                  client_host
-       ~~~~~~~~~~~                                  ~~~~~~~~~~~
 
-       +-----------+         audio stream           +-----------+
-       |para_server| -----------------------------> |para_audiod|
-       +-----------+                                +-----------+
-            ^                                            ^
-            |                                            |
-            |                                            | connect
-            |                                            |
-            |                                            |
-            |                                       +-----------+
-            |                                       |para_audioc|
-            |                                       +-----------+
-            |
-            |
-            |                  connect              +-----------+
-            +-------------------------------------- |para_client|
-                                                    +-----------+
+                                               .____________________.
+                                               |       ______       |
+       .-----------------------.               |    .d########b.    |
+       |.---------------------.|               |  .d############b   |
+       ||                     ||               | .d######""####//b. |
+       ||                     ||               | 9######(  )######P |
+       ||                     ||               | 'b######++######d' |
+       ||       Screen        ||               |  "9############P"  |
+       ||                     ||               |   "9a########P"    |
+       ||                     ||               |      `""""''       |
+       |`---------------------'|               |  ________________  |
+       `-----------------------'               | |________________| |
+             ___)     (___                     |____________________|
+             `-._______.-'                           loudspeaker
+                   |                                     |
+                   |                                     |
+                   |                                     |
+             .____/ \___.     ._____________.     ._____/ \_____.
+             |          |     |             |     |             |
+             | para_gui |-----| para_audioc |-----| para_audiod |
+             |____   ___|     |_____________|     |_____   _____|
+                  \ /                                   \ /
+                   |                                     |
+                   |                                     |
+                   |                                     |
+            ._____/ \_____.                       ._____/ \_____.
+            |             |                       |             |
+            | para_client |-----------------------| para_server |
+            |_____________|                       |_____   _____|
+                                                        \ /
+                                                         |
+                                                         |
+                                                     .-'"""`-.
+                                                    (         )
+                                                    |`-.___.-'|
+                                                    |         |
+                                                    |. ' " ` .|
+                                                    |         |
+                                                     `-.___.-'
+                                                      Database
+
+The two client programs, para_client and para_audioc communicate with
+para_server and para_audiod, respectively.
+
+para_gui controls para_server and para_audiod by executing para_client
+and para_audioc. In particular, it runs a command to obtain the state
+of para_audiod and para_server, and the metadata of the current audio
+file. This information is pretty-printed in a curses window.
+
 The paraslash executables
 -------------------------
 
@@ -61,30 +84,69 @@ The paraslash executables
 
 para_server streams binary audio data (MP3, ...) over local and/or
 remote networks. It listens on a TCP port and accepts commands such
-as play, stop, pause, next from authenticated clients. There are
-many more commands though, see the man page of para_server for a
-description of all commands.
-
-It supports three built-in network streaming protocols
-(senders/receivers): HTTP, DCCP, or UDP. This is explained in more
-detail in the section on [networking](#Networking).
-
-The built-in audio file selector of paraslash is used to manage your
-audio files. It maintains statistics on the usage of all available
-audio files such as last-played time, and the number of times each
-file was selected.
-
-Additional information may be added to the database to allow
+as play, stop, pause, next from authenticated clients. The components
+of para_server are illustrated in the following diagram:
+
+       ______________________________________________________________________ network
+             |                                  |      |      |         |
+             |           .-'""""`-.             |      |      |         |
+             |          (          )            |      |      |         |
+       .____/ \_____.   |`-.____.-'|      .____/ \____/ \____/ \____.   |
+       |            |   |          |      |                         |   |
+       | dispatcher |   | database |      | senders (http/udp/dccp) |   |
+       |____   _____|   |          |      |___________   ___________|   |
+            \ /         |. ' "" ` .|                  \ /               |
+             |          |          |                   |                |
+             |           `-.____.-'                    |                |
+             |               |                         |                |
+             |               |                         |                |
+             |               |                         |                |
+             |        ._____/ \_____.        .________/ \________.      |
+             |        |             |        |                   |      |
+             |        | audio  file |________| virtual streaming |      |
+             |        |  selector   |        |      system       |      |
+             |        |_____   _____|        |________   ________|      |
+             |              \ /                       \ /               |
+             |               |                         |                |
+             |               |                         |                |
+             |               |   ._________________.   |                |
+             |               |   |                 |   |                |
+             |               `---| command handler |---'                |
+             |                   |____   ___   ____|                    |
+             |                        \ /   \ /                         |
+             |                         |     |                          |
+             |                         |     |                          |
+             |                         |     |                          |
+             `-------------------------'     `--------------------------'
+
+
+Incoming connections arrive at the dispatcher which creates a process
+dedicated to the connection. Its task is to authenticate the client
+and to run the command handler which forwards the client request to
+either the audio file selector or the virtual streaming system. Results
+(if any) are sent back to the client.
+
+The audio file selector manages audio files using various database
+tables. It maintains statistics on the usage of all audio files such as
+last-played time and the number of times each file was selected. It
+is also responsible for selecting and loading audio files for
+streaming. Additional information may be added to the database to allow
 fine-grained selection based on various properties of the audio file,
-including information found in (ID3) tags. However, old-fashioned
-playlists are also supported.
-
-It is also possible to store images (album covers) and lyrics in the
-database and associate these to the corresponding audio files.
-
+including information found in (ID3) tags. Simple playlists are also
+supported. It is possible to store images (album covers) and lyrics
+in the database and associate these to the corresponding audio files.
 The section on the [audio file selector](#The.audio.file.selector)
-discusses this topic.
+discusses this topic in more detail.
 
+Another component of para_server is the virtual streaming system,
+which controls the paraslash senders. During streaming it requests
+small chunks of data (e.g., mp3 frames) from the audio file selector
+and feeds them to the senders which forward the chunks to connected
+clients.
+
+The three senders of para_server correspond to network streaming
+protocols based on HTTP, DCCP, or UDP. This is explained in the
+section on [networking](#Networking).
 
 ### para_client ###
 
@@ -103,18 +165,56 @@ supported through libreadline.
 
 ### para_audiod ###
 
-The local daemon that collects information from para_server.
-
-It runs on the client side and connects to para_server. As soon as
-para_server announces the availability of an audio stream, para_audiod
-starts an appropriate receiver, any number of filters and a paraslash
-writer to play the stream.
-
-Moreover, para_audiod listens on a local socket and sends status
-information about para_server and para_audiod to local clients on
-request. Access via this local socket may be restricted by using Unix
-socket credentials, if available.
-
+The purpose of para_audiod is to download, decode and play an audio
+stream received from para_server. A typical setup looks as follows.
+
+
+              .----------------------------.
+              |                            |
+              |                            |
+       ._____/ \_____.                .___/ \____.
+       |             |     .----------|          |
+       | para_server |     |   .______| receiver |
+       |_____    ____|     |   |      |___   ____|
+             \ /           |   |          \ /
+              |            |   |           |
+              |            |   |           |
+              |            |   |           |
+       ._____/ \_____.     |   |      .___/ \____.
+       |             |     |   |      |          |
+       | status task |-----+   |      | filter 1 |
+       |_____________|         |      |___   ____|
+                               |          \ /
+                               |           |            .____________________.
+                               |           |            |       ______       |
+       .____________.          |      .___/ \____.      |    .d########b.    |
+       |            |          |      |          |      |  .d############b   |
+       | dispatcher |----------'      | filter 2 |      | .d######""####//b. |
+       |_____   ____|                 |___   ____|      | 9######(  )######P |
+             \ /                          \ /           | 'b######++######d' |
+              |                            |            |  "9############P"  |
+              |                            |            |   "9a########P"    |
+       ._____/ \_____.                .___/ \____.      |      `""""''       |
+       |             |                |          |      |  ________________  |
+       | para_audioc |                |  writer  |------| |________________| |
+       |_____________|                |__________|      |____________________|
+
+
+The status task of para_audiod connects to para_server and runs the
+"stat" command to retrieve the current server status. If an audio
+stream is available, para_audiod starts a so-called buffer tree to
+play the stream.
+
+The buffer tree consists of a receiver, any number of filters and a
+writer. The receiver downloads the audio stream from para_server and
+the filters decode or modify the received data. The writer plays the
+decoded stream.
+
+The dispatcher of para_audiod listens on a local socket and runs
+audiod commands on behalf of para_audioc. For example, para_gui runs
+para_audioc to obtain status information about para_audiod and the
+current audio file. Access to the local socket may be restricted by
+means of Unix socket credentials.
 
 ### para_audioc ###
 
@@ -589,27 +689,21 @@ The audio file selector
 paraslash comes with a sophisticated audio file selector (AFS),
 whose main task is to determine which file to stream next, based on
 information on the audio files stored in a database. It communicates
-also with para_client whenever an AFS command is executed, for example
-to answer a database query.
+also with para_client via the command handler whenever an AFS command
+is executed, for example to answer a database query.
 
-Besides the traditional playlists, AFS supports audio file selection
+Besides the simple playlists, AFS supports audio file selection
 based on _moods_ which act as a filter that limits the set of all
-known audio files to those which satisfy certain criteria.  It also
+known audio files to those which satisfy certain criteria. It also
 maintains tables containing images (e.g. album cover art) and lyrics
 that can be associated with one or more audio files.
 
-AFS employs [libosl](http://people.tuebingen.mpg.de/maan/osl/), the
-object storage layer library, as the backend library for storing
-information on audio files, playlists, etc. This library offers
-functionality similar to a relational database, but is much more
-lightweight than a full database backend.
-
 In this chapter we sketch the setup of the [AFS
 process](#The.AFS.process) during server startup and proceed with the
 description of the [layout](#Database.layout) of the various database
 tables. The section on [playlists and moods](#Playlists.and.moods)
 explains these two audio file selection mechanisms in detail
-and contains pratical examples. The way [file renames and content
+and contains practical examples. The way [file renames and content
 changes](#File.renames.and.content.changes) are detected is discussed
 briefly before the [Troubleshooting](#Troubleshooting) section
 concludes the chapter.
@@ -618,24 +712,84 @@ The AFS process
 ---------------
 
 On startup, para_server forks to create the AFS process which opens
-the OSL database tables. The server process communicates with the
-AFS process via pipes and shared memory. Usually, the AFS process
-awakes only briefly whenever the current audio file changes. The AFS
-process determines the next audio file, opens it, verifies it has
-not been changed since it was added to the database and passes the
-open file descriptor to the server process, along with audio file
-meta-data such as file name, duration, audio format and so on. The
-server process then starts to stream the audio file.
-
-The AFS process also accepts connections from local clients via
-a well-known socket. However, only child processes of para_server
-may connect through this socket. All server commands that have the
-AFS_READ or AFS_WRITE permission bits use this mechanism to query or
-change the database.
+the database tables. The AFS process accepts incoming connections
+which arrive either on a pipe which is shared with para_server,
+or on the local socket it is listening on. The setup is as follows.
+
+                 .___________________.  .______________.
+                 |                   |  |              |
+                 | virtual streaming |  | audio format |
+                 |      system       |  |   handler    |
+                 |_________   _______|  |_____   ______|
+                           \ /                \ /
+                            |                  |
+         .-'""""`-.         |                  |          .-'""""`-.
+        (          )        |                  |         (          )
+        |`-.____.-'|    .__/ \________________/ \___.    |`-.____.-'|
+        |          |    |                           |    |          |
+        |   file   |----| AFS (audio file selector) |----|    OSL   |
+        |  system  |    |         process           |    | database |
+        |          |    |___________________________|    |          |
+        |. ' "" ` .|                 |                   |. ' "" ` .|
+        |          |                 |                   |          |
+         `-.____.-'                  |                    `-.____.-'
+                            ._______/ \_______.
+                            |                 |
+                            | command handler |
+                            |_______   _______|
+                                    \ /
+                                     |
+                                     |
+                                     |
+                              ._____/ \_____.
+                              |             |
+                              | para_client |
+                              |_____________|
+
+The virtual streaming system, which is part of the server process,
+communicates with the AFS process via pipes and shared memory. When
+the current audio file changes, it sends a notification through the
+shared pipe. The AFS process queries the database to determine the
+next audio file, opens it, verifies that it has not been changed since
+it was added to the database and passes the open file descriptor back
+to the virtual streaming system, along with audio file meta-data such
+as file name, duration, audio format and so on. The virtual streaming
+system then starts to stream the file.
+
+The command handlers of all AFS server commands use the local socket
+to query or update the database. For example, the command handler of
+the add command sends the path of an audio file to the local socket.
+The AFS process opens the file and tries to find an audio format
+handler which recognizes the file. If all goes well, a new database
+entry with metadata obtained from the audio format handler is added
+to the database.
+
+Note that AFS employs
+[libosl](http://people.tuebingen.mpg.de/maan/osl/), the object
+storage layer library, as the database backend. This library offers
+functionality similar to a relational database, but is much more
+lightweight than a full featured database management system.
 
 Database layout
 ---------------
 
+Metadata about the known audio files is stored in an OSL database. This
+database consists of the following tables:
+
+- The audio file table contains path, hash and metadata of each
+known file.
+
+- The "attributes" table maps each of the 64 possible attributes to a
+string.
+
+- The "blob" tables store images, lyrics, moods, playlists. All of
+these are optional.
+
+- The "score" table describes the subset of admissible files for the
+current playlist or mood.
+
+All tables are described in more detail below.
+
 ### The audio file table ###
 
 This is the most important and usually also the largest table of the