/usr/share/refdb/dtd/xnote.dtd is in refdb-clients 1.0.2-3.
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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | <!-- The xnote XML DTD - extended notes for RefDB -->
<!-- (C) 2003-10-29 Markus Hoenicka <markus@mhoenicka.de> -->
<!-- Invoke with the following declaration -->
<!-- <!DOCTYPE xnoteset PUBLIC "-//Markus Hoenicka//DTD Xnote V1.4//EN" "http://refdb.sourceforge.net/dtd/xnote-1.4/xnote.dtd"> -->
<!-- version number last bumped due to changes in the link type attribute list, use 1.4 for next released version -->
<!-- the top-level element, containing one or more extended notes -->
<!ELEMENT xnoteset (xnote)+>
<!ATTLIST xnoteset
xmlns CDATA #FIXED 'http://refdb.sourceforge.net/namespaces/xnote'>
<!-- this element describes one extended note -->
<!ELEMENT xnote (title?, content?, keyword*, link*, ulink*)>
<!ATTLIST xnote id NMTOKEN #IMPLIED
citekey NMTOKEN #IMPLIED
user NMTOKEN #IMPLIED
date NMTOKEN #IMPLIED
share (public|private) #IMPLIED>
<!-- the optional title of a note -->
<!ELEMENT title (#PCDATA)>
<!-- the contents of the note -->
<!ELEMENT content ANY>
<!ATTLIST content type CDATA #IMPLIED
xml:lang CDATA #IMPLIED>
<!-- keyword for indexing purposes -->
<!ELEMENT keyword (#PCDATA)>
<!-- the link element, defines relations to other objects -->
<!ELEMENT link EMPTY>
<!ATTLIST link type (reference|refid|author|keyword|journalfull|journalabbrev|journalcustabbrev1|journalcustabbrev2) #REQUIRED
target CDATA #REQUIRED>
<!-- an URL of a web resource -->
<!ELEMENT ulink (#PCDATA)>
<!ATTLIST ulink type (url|pdf|fulltext|related|image) "url">
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