1 <?xml version="1.0" encoding="iso-8859-1"?>
3 <!ELEMENT publication (title,author*,where,html?)>
4 <!ELEMENT title (#PCDATA)>
6 <!-- name,surname must be provided iff the "file" attribute is not provided -->
7 <!ELEMENT author (name,surname)?>
11 <!ELEMENT where (#PCDATA)>
12 <!ELEMENT name (#PCDATA)>
13 <!ELEMENT surname (#PCDATA)>