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<?xml encoding="ISO-8859-1"?>
<!-- Copyright (C) 2000-2004, HELM Team -->
<!-- -->
<!-- This file is part of HELM, an Hypertextual, Electronic -->
<!-- Library of Mathematics, developed at the Computer Science -->
<!-- Department, University of Bologna, Italy. -->
<!-- -->
<!-- HELM is free software; you can redistribute it and/or -->
<!-- modify it under the terms of the GNU General Public License -->
<!-- as published by the Free Software Foundation; either version 2 -->
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<!-- MA 02111-1307, USA. -->
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<!-- For details, see the HELM World-Wide-Web page, -->
<!-- http://cs.unibo.it/helm/. -->
<!-- Notice: the markup described in this DTD is meant to be embedded -->
<!-- in foreign markup (e.g. XHTML) -->
<!ENTITY % theorystructure
'(ht:AXIOM|ht:DEFINITION|ht:THEOREM|ht:VARIABLE|ht:SECTION|ht:MUTUAL)*'>
<!ELEMENT ht:SECTION (%theorystructure;)>
<!ATTLIST ht:SECTION
uri CDATA #REQUIRED>
<!ELEMENT ht:MUTUAL (ht:DEFINITION,ht:DEFINITION+)>
<!-- Theory Items -->
<!ELEMENT ht:AXIOM (Axiom)>
<!ATTLIST ht:AXIOM
uri CDATA #REQUIRED
as (Axiom|Declaration) #REQUIRED>
<!ELEMENT ht:DEFINITION (Definition|InductiveDefinition)>
<!ATTLIST ht:DEFINITION
uri CDATA #REQUIRED
as (Definition|InteractiveDefinition|Inductive|CoInductive
|Record) #REQUIRED>
<!ELEMENT ht:THEOREM (type)>
<!ATTLIST ht:THEOREM
uri CDATA #REQUIRED
as (Theorem|Lemma|Corollary|Fact|Remark) #REQUIRED>
<!ELEMENT ht:VARIABLE (Variable)>
<!ATTLIST ht:VARIABLE
uri CDATA #REQUIRED
as (Assumption|Hypothesis|LocalDefinition|LocalFact) #REQUIRED>
|