<!-- 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 -->
<!--*****************************************************************-->
-<!-- DA AGGIUNGERE:
-CONJECTURE (teo da dim)
-EXERCISE
-EXAMPLE -->
-
<!ENTITY % cicobj SYSTEM "cicobject.dtd">
%cicobj;
-<!ENTITY % theorystructure '(THEOREM|LEMMA|COROLLARY|AXIOM|FACT|DEFINITION|
- VARIABLE|SECTION)*'>
-
-<!-- Theory -->
-
-<!ELEMENT Theory (%theorystructure;)>
-<!ATTLIST Theory
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
-
-<!-- Theory Items -->
-
-<!ELEMENT THEOREM (type)>
-<!ATTLIST THEOREM
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
-
-<!ELEMENT LEMMA (type)>
-<!ATTLIST LEMMA
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
+<!ENTITY % theorystructure
+ '(ht:AXIOM|ht:DEFINITION|ht:THEOREM|ht:VARIABLE|ht:SECTION|ht:MUTUAL)*'>
-<!ELEMENT COROLLARY (type)>
-<!ATTLIST COROLLARY
- name CDATA #REQUIRED
+<!ELEMENT ht:SECTION (%theorystructure;)>
+<!ATTLIST ht:SECTION
uri CDATA #REQUIRED>
-<!ELEMENT AXIOM (Axiom)>
-<!ATTLIST AXIOM
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
+<!ELEMENT ht:MUTUAL (ht:DEFINITION,ht:DEFINITION+)>
-<!ELEMENT FACT (type)>
-<!ATTLIST FACT
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
-
-<!ELEMENT DEFINITION (Definition|InductiveDefinition)>
-<!ATTLIST DEFINITION
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
-
-<!ELEMENT VARIABLE (Variable)>
-<!ATTLIST VARIABLE
- name CDATA #REQUIRED
- uri CDATA #REQUIRED>
+<!-- Theory Items -->
-<!ELEMENT SECTION (%theorystructure;)>
-<!ATTLIST SECTION
- uri CDATA #REQUIRED>
+<!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>