/usr/share/wireshark/dtds/dc.dtd is in libwireshark-data 1.6.7-1.
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 | <? wireshark:protocol proto_name="dc" description="Dublin Core Metadata (DC)" ?>
<!--
$Id: dc.dtd 19612 2006-10-19 18:35:10Z lego $
-->
<!--
elements definitions for the Dublin Core Metadata DC schema
element names obtained from http://www.dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsd
-->
<!DOCTYPE dc [
<!ELEMENT title (#PCDATA) >
<!ELEMENT creator (#PCDATA) >
<!ELEMENT subject (#PCDATA) >
<!ELEMENT description (#PCDATA) >
<!ELEMENT publisher (#PCDATA) >
<!ELEMENT contributor (#PCDATA) >
<!ELEMENT date (#PCDATA) >
<!ELEMENT type (#PCDATA) >
<!ELEMENT format (#PCDATA) >
<!ELEMENT identifier (#PCDATA) >
<!ELEMENT source (#PCDATA) >
<!ELEMENT language (#PCDATA) >
<!ELEMENT relation (#PCDATA) >
<!ELEMENT coverage (#PCDATA) >
<!ELEMENT rights (#PCDATA) >
]>
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