Edit file File name : reginfo.dtd Content :<? wireshark:protocol proto_name="reginfo" description="Reginfo XML doc (RFC 3680)" hierarchy="yes" ?> <!ELEMENT reginfo (registration)* > <!ATTLIST reginfo xmlns CDATA #IMPLIED version CDATA #REQUIRED state CDATA #REQUIRED> <!ELEMENT registration (contact)*> <!ATTLIST registration aor CDATA #REQUIRED id CDATA #REQUIRED state CDATA #REQUIRED> <!ELEMENT contact (uri | display-name? | unknown-param?)* > <!ATTLIST contact id CDATA #REQUIRED state CDATA #REQUIRED event CDATA #REQUIRED expires CDATA #IMPLIED retry-after CDATA #IMPLIED duration-registered CDATA #IMPLIED q CDATA #IMPLIED cseq CDATA #IMPLIED callid CDATA #IMPLIED> <!ELEMENT uri (#PCDATA)> <!ELEMENT display-name (#PCDATA)> <!ATTLIST display-name lang CDATA #IMPLIED> <!ELEMENT unknown-param (#PCDATA)> <!ATTLIST unknown-param name CDATA #REQUIRED> Save