<!--*****************************************************************-->
<!-- DTD FOR THEORY OBJECTS AT LEVEL OF MATHML CONTENT: -->
<!-- First draft: May 9 2000, Irene Schena -->
+<!-- Second draft: March 15 2001, Irene Schena -->
+<!-- Third draft: May 3 2001, Irene Schena -->
<!--*****************************************************************-->
<!ENTITY % cicobj SYSTEM "cicobject.dtd">
%cicobj;
-<!-- THEORY section: -->
+<!ENTITY % theorystructure
+ '(ht:AXIOM|ht:DEFINITION|ht:THEOREM|ht:VARIABLE|ht:SECTION|ht:MUTUAL)*'>
-<!ELEMENT SECTION (SECTION|Definition|Axiom|InductiveDefinition|Variable)*>
+<!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>