/usr/share/djvu/pubtext/DjVuMessages.dtd is in libdjvulibre-text 3.5.25.4-3.
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 | <?xml version="1.0" ?>
<!-- Data Type Definition for the message files -->
<!--================ HEAD (Include List) ==================================-->
<!ELEMENT INCLUDE EMPTY>
<!ATTLIST INCLUDE name CDATA #REQUIRED>
<!-- The value of the name attribute must be the name of an XML file
conforming to this DTD -->
<!ELEMENT HEAD ( INCLUDE* )>
<!--================ BODY (Message List) ==================================-->
<!ELEMENT MESSAGE (#PCDATA) >
<!ATTLIST MESSAGE name CDATA #REQUIRED>
<!ATTLIST MESSAGE number CDATA #REQUIRED>
<!ATTLIST MESSAGE value CDATA #REQUIRED>
<!ELEMENT BODY ( MESSAGE* )>
<!--================ Document Structure ==================================-->
<!ELEMENT DjVuMessages ( HEAD? , BODY? )>
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