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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 -->
+<!-- of the License, or (at your option) any later version. -->
+<!-- -->
+<!-- HELM is distributed in the hope that it will be useful, -->
+<!-- but WITHOUT ANY WARRANTY; without even the implied warranty of -->
+<!-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -->
+<!-- GNU General Public License for more details. -->
+<!-- -->
+<!-- You should have received a copy of the GNU General Public License -->
+<!-- along with HELM; if not, write to the Free Software -->
+<!-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, -->
+<!-- MA 02111-1307, USA. -->
+<!-- -->
+<!-- For details, see the HELM World-Wide-Web page, -->
+<!-- http://cs.unibo.it/helm/. -->
+
+<!-- DTD FOR CIC OBJECTS: -->
+
+<!-- CIC term declaration -->
+
+<!ENTITY % term '(LAMBDA|CAST|PROD|REL|SORT|APPLY|VAR|META|IMPLICIT|CONST|
+ LETIN|MUTIND|MUTCONSTRUCT|MUTCASE|FIX|COFIX|instantiate)'>
+
+<!-- CIC sorts -->
+
+<!ENTITY % sort '(Prop|Set|Type|CProp)'>
+
+<!-- CIC sequents -->
+
+<!ENTITY % sequent '((Decl|Def|Hidden)*,Goal)'>
+
+<!-- CIC objects: -->
+
+<!ELEMENT ConstantType %term;>
+<!ATTLIST ConstantType
+ name CDATA #REQUIRED
+ params CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT ConstantBody %term;>
+<!ATTLIST ConstantBody
+ for CDATA #REQUIRED
+ params CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT CurrentProof (Conjecture*,body)>
+<!ATTLIST CurrentProof
+ of CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT InductiveDefinition (InductiveType+)>
+<!ATTLIST InductiveDefinition
+ noParams NMTOKEN #REQUIRED
+ params CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT Variable (body?,type)>
+<!ATTLIST Variable
+ name CDATA #REQUIRED
+ params CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT Sequent %sequent;>
+<!ATTLIST Sequent
+ no NMTOKEN #REQUIRED
+ id ID #REQUIRED>
+
+<!-- Elements used in CIC objects, which are not terms: -->
+
+<!ELEMENT InductiveType (arity,Constructor*)>
+<!ATTLIST InductiveType
+ name CDATA #REQUIRED
+ inductive (true|false) #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT Conjecture %sequent;>
+<!ATTLIST Conjecture
+ no NMTOKEN #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT Constructor %term;>
+<!ATTLIST Constructor
+ name CDATA #REQUIRED>
+
+<!ELEMENT Decl %term;>
+<!ATTLIST Decl
+ name CDATA #IMPLIED
+ id ID #REQUIRED>
+
+<!ELEMENT Def %term;>
+<!ATTLIST Def
+ name CDATA #IMPLIED
+ id ID #REQUIRED>
+
+<!ELEMENT Hidden EMPTY>
+<!ATTLIST Hidden
+ id ID #REQUIRED>
+
+<!ELEMENT Goal %term;>
+
+<!-- CIC terms: -->
+
+<!ELEMENT LAMBDA (decl*,target)>
+<!ATTLIST LAMBDA
+ sort %sort; #REQUIRED>
+
+<!ELEMENT LETIN (def*,target)>
+<!ATTLIST LETIN
+ sort %sort; #REQUIRED>
+
+<!ELEMENT PROD (decl*,target)>
+<!ATTLIST PROD
+ type %sort; #REQUIRED>
+
+<!ELEMENT CAST (term,type)>
+<!ATTLIST CAST
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT REL EMPTY>
+<!ATTLIST REL
+ value NMTOKEN #REQUIRED
+ binder CDATA #REQUIRED
+ id ID #REQUIRED
+ idref IDREF #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT SORT EMPTY>
+<!ATTLIST SORT
+ value CDATA #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT APPLY (%term;)+>
+<!ATTLIST APPLY
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT VAR EMPTY>
+<!ATTLIST VAR
+ uri CDATA #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!-- The substitutions are ordered by increasing DeBrujin -->
+<!-- index. An empty substitution means that that index is -->
+<!-- not accessible. -->
+<!ELEMENT META (substitution*)>
+<!ATTLIST META
+ no NMTOKEN #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT IMPLICIT EMPTY>
+<!ATTLIST IMPLICIT
+ id ID #REQUIRED>
+
+<!ELEMENT CONST EMPTY>
+<!ATTLIST CONST
+ uri CDATA #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT MUTIND EMPTY>
+<!ATTLIST MUTIND
+ uri CDATA #REQUIRED
+ noType NMTOKEN #REQUIRED
+ id ID #REQUIRED>
+
+<!ELEMENT MUTCONSTRUCT EMPTY>
+<!ATTLIST MUTCONSTRUCT
+ uri CDATA #REQUIRED
+ noType NMTOKEN #REQUIRED
+ noConstr NMTOKEN #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT MUTCASE (patternsType,inductiveTerm,pattern*)>
+<!ATTLIST MUTCASE
+ uriType CDATA #REQUIRED
+ noType NMTOKEN #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT FIX (FixFunction+)>
+<!ATTLIST FIX
+ noFun NMTOKEN #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!ELEMENT COFIX (CofixFunction+)>
+<!ATTLIST COFIX
+ noFun NMTOKEN #REQUIRED
+ id ID #REQUIRED
+ sort %sort; #REQUIRED>
+
+<!-- Elements used in CIC terms: -->
+
+<!ELEMENT FixFunction (type,body)>
+<!ATTLIST FixFunction
+ name CDATA #REQUIRED
+ id ID #REQUIRED
+ recIndex NMTOKEN #REQUIRED>
+
+<!ELEMENT CofixFunction (type,body)>
+<!ATTLIST CofixFunction
+ id ID #REQUIRED
+ name CDATA #REQUIRED>
+
+<!ELEMENT substitution ((%term;)?)>
+
+<!-- Explicit named substitutions: -->
+
+<!ELEMENT instantiate ((CONST|MUTIND|MUTCONSTRUCT|VAR),arg+)>
+<!ATTLIST instantiate
+ id ID #IMPLIED>
+
+<!-- Sintactic sugar for CIC terms and for CIC objects: -->
+
+<!ELEMENT arg %term;>
+<!ATTLIST arg
+ relUri CDATA #REQUIRED>
+
+<!ELEMENT decl %term;>
+<!ATTLIST decl
+ id ID #REQUIRED
+ type %sort; #REQUIRED
+ binder CDATA #IMPLIED>
+
+<!ELEMENT def %term;>
+<!ATTLIST def
+ id ID #REQUIRED
+ sort %sort; #REQUIRED
+ binder CDATA #IMPLIED>
+
+<!ELEMENT target %term;>
+
+<!ELEMENT term %term;>
+
+<!ELEMENT type %term;>
+
+<!ELEMENT arity %term;>
+
+<!ELEMENT patternsType %term;>
+
+<!ELEMENT inductiveTerm %term;>
+
+<!ELEMENT pattern %term;>
+
+<!ELEMENT body %term;>
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