32 "name" : "messagetype",
36 "name" : "messagelength",
38 "autoincrease" : "true"
45 "name" : "sequencenumber",
47 "optional" : "e=1|s=1|pn=1",
48 "increaselength" : "true"
51 "name" : "npdunumber",
53 "optional" : "e=1|s=1|pn=1",
54 "increaselength" : "true"
57 "name" : "nextextentionheadertype",
59 "optional" : "e=1|s=1|pn=1",
60 "increaselength" : "true"