/usr/share/doc/mkvtoolnix/examples/matroskasegmentinfo.dtd is in mkvtoolnix 8.8.0-1.
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 | <!ELEMENT Info (
SegmentUID?,
NextSegmentUID?,
PreviousSegmentUID?,
SegmentFamily?,
SegmentFilename?,
NextSegmentFilename?,
PreviousSegmentFilename?,
ChapterTranslate*)>
<!ELEMENT SegmentUID (#PCDATA)>
<!ELEMENT NextSegmentUID (#PCDATA)>
<!ELEMENT PreviousSegmentUID (#PCDATA)>
<!ELEMENT SegmentFamily (#PCDATA)>
<!ELEMENT SegmentFilename (#PCDATA)>
<!ELEMENT NextSegmentFilename (#PCDATA)>
<!ELEMENT PreviousSegmentFilename (#PCDATA)>
<!ELEMENT ChapterTranslate (
ChapterTranslateEditionUID,
ChapterTranslateCodec,
ChapterTranslateID)>
<!ELEMENT ChapterTranslateEditionUID (#PCDATA)>
<!ELEMENT ChapterTranslateCodec (#PCDATA)>
<!ELEMENT ChapterTranslateID (#PCDATA)>
|