/usr/share/wireshark/dtds/reginfo.dtd is in libwireshark-data 2.0.2+ga16e22e-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | <? 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>
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