+
+option "ccid" c
+"CCID preference(s) for this connection"
+int
+# restrict the maximum number of times this option can be passed
+optional multiple(-10)
+# currently known CCIDs:
+# - CCID-2 (RFC 4341),
+# - CCID-3 (RFC 4342),
+# - CCID-4 (RFC 5622),
+# - CCID-248 ... CCID-254 are experimental (RFC 4340, 19.5)
+values="2", "3", "4", "248", "249", "250", "251", "252", "253", "254"
+details="
+ When present exactly once, this option mandates the CCID for the
+ sender-receiver connection. If it is passed more than once, it sets
+ a preference list where the order of appearance signifies descending
+ priority. For example, passing 4, 2, 3 creates the preference list
+ (CCID-4, CCID-2, CCID-3), assigning CCID-4 highest preference.
+
+ The request is reconciled with the CCIDs on the server through the
+ 'server-priority' mechanism of RFC 4340 6.3.1/10. The server CCIDs
+ can be listed by calling 'para_client si'.
+
+"