SRML (Simple Rule Markup Language) DTD

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<!-- SRML (Simple Rule Markup Language) DTD -->
<?xml version="1.0" encoding="ISO-8859-1"?>
<!ELEMENT ruleset (rule*)>
<!ATTLIST ruleset
   name NMTOKEN #IMPLIED>
<!ELEMENT rule ( priority?, conditionPart, actionPart ) >
<!ATTLIST rule
   name NMTOKEN #REQUIRED>
<!ELEMENT priority (%expression;)>
<!ELEMENT conditionPart (%condition;)+>
<!ELEMENT actionPart (%action;)* >
<!ENTITY % condition "(simpleCondition | notCondition)">
<!ENTITY % action "(assignment | bind | assert | assertobj
                    | modify | retract)">
<!ELEMENT simpleCondition (%expression;)*>
<!ATTLIST simpleCondition
   className CDATA #REQUIRED
   objectVariable NMTOKEN #IMPLIED>
<!ELEMENT notCondition (%expression;)*>
<!ATTLIST notCondition
   className CDATA #REQUIRED>
<!ELEMENT assert (assignment | bind)* >
<!ATTLIST assert
   className CDATA #REQUIRED>
<!ELEMENT assertobj (%expression;)>
<!ELEMENT retract (variable)>
<!ELEMENT modify (variable, (assignment | bind)+)>
<!ENTITY % expression
  "(%assignable; | constant | unaryExp | binaryExp | naryExp)">
<!ELEMENT unaryExp (%expression;)>
<!ATTLIST unaryExp operator (plus | minus | not) #REQUIRED>
<!ELEMENT binaryExp (%expression;,%expression;)>
<!ATTLIST binaryExp
   operator (eq | neq | lt | lte | gt | gte) #REQUIRED>
<!ELEMENT naryExp (%expression;)+>
<!ATTLIST naryExp
   operator (add | subtract | multiply | divide |
             remainder | and | or) #REQUIRED>
<!ELEMENT assignment (%assignable;,%expression;)>
<!ELEMENT bind (%expression;) >
<!ATTLIST bind
   name NMTOKEN #REQUIRED>
<!ELEMENT constant EMPTY>
<!ATTLIST constant
   type (string | boolean | byte | short | char | long
          | int | float | double | null) #REQUIRED 
   value CDATA #REQUIRED>
<!ENTITY % assignable "(variable | field)">
<!ELEMENT variable EMPTY>
<!ATTLIST variable
   name NMTOKEN #REQUIRED>
<!ELEMENT field (%expression;)?>
<!ATTLIST field
   name NMTOKEN #REQUIRED>

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Prepared by Robin Cover for The XML Cover Pages archive. See also (1) the plain text format and (2) the main entry "Simple Rule Markup Language (SRML)."

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