1 <?xml encoding="ISO-8859-1"?>
3 <!-- Copyright (C) 2000, HELM Team -->
5 <!-- This file is part of HELM, an Hypertextual, Electronic -->
6 <!-- Library of Mathematics, developed at the Computer Science -->
7 <!-- Department, University of Bologna, Italy. -->
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27 <!-- DTD for backward pointers metadata. For every object, it lists -->
28 <!-- all the other objects directly depending on it. -->
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32 xml:lang CDATA #REQUIRED
33 xmlns:rdf CDATA #FIXED "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
34 xmlns:h CDATA #FIXED "http://www.cs.unibo.it/helm/schemas/mattone.rdf#">
36 <!ELEMENT h:Object (h:backPointer)*>
38 rdf:about CDATA #REQUIRED>
40 <!ELEMENT h:backPointer (h:Occurrence)>
42 <!ELEMENT h:Occurrence (h:position,h:occurrence)>
44 <!-- Either MainHypothesis or InHypothesis or InConclusion or -->
45 <!-- MainConclusion or InBody. -->
46 <!ELEMENT h:position (#PCDATA)>
48 <!ELEMENT h:occurrence (#PCDATA)>