/usr/share/doc/flexml/examples/test.dtd is in flexml 1.9.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | <!ENTITY % Test SYSTEM "test.ent">
<!ELEMENT top (bot,bot)>%Test;<!ELEMENT bot (#PCDATA)>
<!--The end.-->
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