This is the XML schema for the Rule Language as defined by the Last Call Draft of the RIF Basic Logic Dialect. The schema is based on the following EBNF for the RIF-BLD Rule Language: Document ::= IRIMETA? 'Document' '(' Base? Prefix* Import* Group? ')' Base ::= 'Base' '(' ANGLEBRACKIRI ')' Prefix ::= 'Prefix' '(' NCName ANGLEBRACKIRI ')' Import ::= IRIMETA? 'Import' '(' LOCATOR PROFILE? ')' Group ::= IRIMETA? 'Group' '(' (RULE | Group)* ')' RULE ::= (IRIMETA? 'Forall' Var+ '(' CLAUSE ')') | CLAUSE CLAUSE ::= Implies | ATOMIC Implies ::= IRIMETA? (ATOMIC | 'And' '(' ATOMIC* ')') ':-' FORMULA LOCATOR ::= ANGLEBRACKIRI PROFILE ::= ANGLEBRACKIRI Note that this is an extension of the syntax for the RIF-BLD Condition Language (BLDCond.xsd).