/usr/share/stylebook/styles/apachexml/dtd/links.ent is in libstylebook-java 1.0~b3~svn20061109-6.
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 encoding='US-ASCII'?>
<!-- LINKS ENTITY -->
<!ENTITY % links "link|anchor|jump|img|resource-ref|human-resource-ref">
<!ELEMENT anchor EMPTY>
<!ATTLIST anchor name NMTOKEN #REQUIRED>
<!ELEMENT img EMPTY>
<!ATTLIST img src CDATA #REQUIRED
alt CDATA #REQUIRED>
<!ELEMENT link (#PCDATA|img)*>
<!ATTLIST link idref NMTOKEN #IMPLIED
anchor CDATA #IMPLIED>
<!ELEMENT jump (#PCDATA|img)*>
<!ATTLIST jump href CDATA #REQUIRED>
<!-- cross-reference resource elements -->
<!ELEMENT resource-ref EMPTY>
<!ATTLIST resource-ref idref CDATA #REQUIRED>
<!ELEMENT human-resource-ref EMPTY>
<!ATTLIST human-resource-ref idref CDATA #REQUIRED>
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