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ABNF for SDP
RFC 4566and many other RFCs

Session Description   v=   o=   s=   i=   u=   e=   p=   c=   b=   t=  r=  z=   k=   a=   m=   SDP Addressing   SDP generic rules   "a=" SDP Attributes
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SDP attributes defined in

RFC 3407 – Simple Capability Declaration (simcap)

RFC 3407Section 3Section 5
a=sqn   a=cdsc   a=cpar   a=cparmin   a=cparmax

Note:  no ABNF definitions for theses attributes


;  a=sqn:<sqn‑num>
;  see  Here  in RFC 3407
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;  a=cdsc:<cap‑num> <media> <transport> <fmt list>
;  see  Here  in RFC 3407
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;  a=cpar:<cap‑par>
;  see  Here  in RFC 3407
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;  a=cparmin:<cap‑par>
;  see  Here  in RFC 3407
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;  a=cparmax:<cap‑par>
;  see  Here  in RFC 3407
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