rfc6223.txt:Christer Holmberg:ericsson:finland:18:apr:2011:UNKNOWN:figure,abnf,kwd,seccons,ianacons:draft-ietf-sipcore-keep:2011-01-24:2010-10-19:49:0:16:35:100:4:2008-05-06:363:draft-holmberg-sip-keep:2009-05-04:530:2011-04-11:77