<!-- http://cs.unibo.it/helm/. -->
<!--*****************************************************************-->
-<!-- DTD FOR the MATHEMATICAL QUERY MARKUP LANGUAGE (MathQML) -->
+<!-- DTD FOR the MATHEMATICAL QUERY MARKUP LANGUAGE (XMathQL) -->
<!-- First draft: April 2002, Irene Schena -->
<!--*****************************************************************-->
<!-- 3) reusing queries saved in a standard format -->
<!-- The syntax reflects the structure of the grammar productions of -->
<!-- MathQL. -->
-<!-- The %queryexpr parameter entity is used to allow all query -->
-<!-- expression types to occur -->
<!-- Operators are unambiguous (binary or unary), so there isn't any -->
<!-- grouping operator. -->
-<!-- CONST is the constant string. -->
-<!-- The attributes binder and rvar declare variables which are -->
-<!-- referred to and used by means of respectively BINDER and RVAR -->
+<!-- CONST is the constant string; rvar is for references and lvar -->
+<!-- for list. -->
+<!-- The attributes binder, rvar, lvar declare variables which are -->
+<!-- referred to and used by means of respectively BINDER, Rvar and -->
+<!-- RVAR, Lvar and LVAR. -->
+<!-- Rvar (Lvar) is casted to a list, on the contrary the use of RVAR-->
+<!-- (LVAR) is casted to a string. -->
+<!-- PROPERTY works on a specified RDF property returning its value. -->
<!--*****************************************************************-->
-<!ENTITY % position '(Conclusion|Hypothesis|Body|MainConclusion|
- MainHypothesis)'>
+<!ENTITY % position '(MainHypothesis|Hypothesis|MainConclusion|Conclusion|
+ Body)'>
<!ENTITY % bool '(True|False)'>
-<!-- MathQL query expression declaration -->
+<!ENTITY % token '(CONST|STAR|TWOSTARS|SLASH|QUESTIONMARK)'>
-<!ENTITY % queryexpr '(Union|Intersect|Diff|Select|Exists|Use|UsedBy|
- ConstructorsOf|Pattern|InTheory|TheoryRefTo|TypeOf|
- SuperTypeOf|SubTypeOf|Group)'>
+<!-- MathQL list expression declaration -->
+
+<!ENTITY % listexpr '(Rvar|Lvar|Reference|Pattern|Select|Exists|LetIn|
+ Use|UsedBy|ConstructorsOf|InTheory|TheoryRefTo|
+ TypeOf|SuperTypeOf|SubTypeOf|Union|Intersect|Diff)'>
<!-- MathQL boolean expression declaration -->
-<!ENTITY % boolexpr '(AND|OR|NOT|BOOL|IS|GROUP)'>
+<!ENTITY % boolexpr '(BOOL|NOT|AND|OR|IS|SETEQUAL|SUBSET)'>
<!-- MathQL string expression declaration -->
<!ENTITY % stringexpr '(CONST|POSITION|RVAR|BINDER|%functexpr;)'>
-<!-- MathQL top-element -->
+<!-- MathQL query top-element -->
-<!ELEMENT MathQL %queryexpr;>
+<!ELEMENT MQLquery %listexpr;>
-<!-- MathQL query expressions -->
+<!-- MathQL list expressions -->
+<!ELEMENT Rvar EMPTY>
+<!ATTLIST Rvar
+ name CDATA #REQUIRED>
-<!ELEMENT Union (%queryexpr;, %queryexpr;)>
+<!ELEMENT Lvar EMPTY>
+<!ATTLIST Lvar
+ name CDATA #REQUIRED>
-<!ELEMENT Intersect (%queryexpr;, %queryexpr;)>
+<!ELEMENT Reference (RPrefix, RBody, Ext, (RFragmentID?))>
-<!ELEMENT Diff (%queryexpr;, %queryexpr;)>
+<!ELEMENT Pattern (PPrefix, PBody, (Ext?), (PFragmentID?))>
<!ELEMENT Select (In, Where)>
<!ELEMENT Exists (In, Where)>
-<!ELEMENT Use (%queryexpr;, Position)>
-
-<!ELEMENT Position EMPTY>
-<!ATTLIST Position
- binder CDATA #REQUIRED>
-
-<!ELEMENT UsedBy (%queryexpr;, Position)>
+<!ELEMENT LetIn (%listexpr;, Target)>
-<!ELEMENT ConstructorsOf %queryexpr;>
+<!ELEMENT Use (%listexpr;, Position)>
-<!ELEMENT Pattern (Prefix, TokenList, (FragmentID?))>
+<!ELEMENT UsedBy (%listexpr;, Position)>
-<!ELEMENT InTheory (%queryexpr;, ItemType)>
+<!ELEMENT ConstructorsOf %listexpr;>
-<!ELEMENT ItemType EMPTY>
-<!ATTLIST ItemType
- binder CDATA #REQUIRED>
+<!ELEMENT InTheory (%listexpr;, ItemType)>
-<!ELEMENT TheoryRefTo %queryexpr;>
+<!ELEMENT TheoryRefTo %listexpr;>
-<!ELEMENT TypeOf %queryexpr;>
+<!ELEMENT TypeOf %listexpr;>
<!ATTLIST TypeOf
binder CDATA #REQUIRED>
-<!ELEMENT SuperTypeOf %queryexpr;>
+<!ELEMENT SuperTypeOf %listexpr;>
<!ATTLIST SuperTypeOf
binder CDATA #REQUIRED>
-<!ELEMENT SubTypeOf %queryexpr;>
+<!ELEMENT SubTypeOf %listexpr;>
<!ATTLIST SubTypeOf
binder CDATA #REQUIRED>
-<!-- MathQL query sub-expressions -->
+<!ELEMENT Union (%listexpr;, %listexpr;)>
-<!ELEMENT In %queryexpr;>
+<!ELEMENT Intersect (%listexpr;, %listexpr;)>
-<!ELEMENT Where %boolexpr;>
-<!ATTLIST Where
- rvar CDATA #REQUIRED>
+<!ELEMENT Diff (%listexpr;, %listexpr;)>
-<!ELEMENT STAR EMPTY>
+<!-- MathQL list sub-expressions -->
-<!ELEMENT TWOSTARS EMPTY>
+<!ELEMENT RPrefix (CONST)>
-<!ELEMENT SLASH EMPTY>
+<!ELEMENT RBody (CONST)>
-<!ELEMENT QUESTIONMARK EMPTY>
+<!ELEMENT RFragmentID (NUMBER)+>
+
+<!ELEMENT Ext (CONST)>
+
+<!ELEMENT PPrefix (CONST|STAR)>
+
+<!ELEMENT PBody (%token;)+>
+
+<!-- XPointers have max depth = 2 (see CIC inductive definitions) -->
+<!ELEMENT PFragmentID (NUMBER|TWOSTARS|STAR)+>
<!ELEMENT NUMBER EMPTY>
<!ATTLIST NUMBER
value NMTOKEN #REQUIRED>
+<!-- We need SLASH for grouping CONST with QUESTIONMARK -->
+<!ELEMENT SLASH EMPTY>
+
<!-- STAR expands only to objects of the specified dir before the last "/":
ex. cic:/Algebra/* expands to every object in Algebra only -->
+<!ELEMENT STAR EMPTY>
+
<!-- TWOSTARS expands till the most complete name (with extension if not
specifified) -->
+<!ELEMENT TWOSTARS EMPTY>
+
<!-- QUESTIONMARK matches one character except "/" -->
-<!ELEMENT TokenList (CONST|STAR|TWOSTARS|SLASH|QUESTIONMARK)+>
+<!ELEMENT QUESTIONMARK EMPTY>
-<!ELEMENT Prefix (CONST|STAR)>
+<!ELEMENT In %listexpr;>
-<!-- XPointers have max depth = 2 (see CIC inductive definitions) -->
-<!ELEMENT FragmentID (NUMBER|TWOSTARS|STAR)+>
+<!ELEMENT Where %boolexpr;>
+<!ATTLIST Where
+ rvar CDATA #REQUIRED>
+
+<!ELEMENT Target %listexpr;>
+<!ATTLIST Target
+ lvar CDATA #REQUIRED>
+
+<!ELEMENT Position EMPTY>
+<!ATTLIST Position
+ binder CDATA #REQUIRED>
+
+<!ELEMENT ItemType EMPTY>
+<!ATTLIST ItemType
+ binder CDATA #REQUIRED>
<!-- MathQL boolean expressions -->
+<!ELEMENT BOOL EMPTY>
+<!ATTLIST BOOL
+ value %bool; #REQUIRED>
+
+<!ELEMENT NOT %boolexpr;>
+
<!ELEMENT AND (%boolexpr;, %boolexpr;)>
<!ELEMENT OR (%boolexpr;, %boolexpr;)>
-<!ELEMENT NOT %boolexpr;>
-
<!ELEMENT IS (%stringexpr;, %stringexpr;)>
-<!ELEMENT BOOL EMPTY>
-<!ATTLIST BOOL
- value %bool; #REQUIRED>
+<!ELEMENT SETEQUAL (%listexpr;, %listexpr;)>
+
+<!ELEMENT SUBSET (%listexpr;, %listexpr;)>
<!-- MathQL string expressions -->
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