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isHornClause() - Method in class org.semanticweb.ruqar.rules.Rule

Checks if a rule is a Horn clause in this case - whether or not only one triple exists in the head.

isSafe() - Method in class org.semanticweb.ruqar.rules.Rule

Checks if a rule is safe - none of variables exist only in the head.

isVariable - Variable in class org.semanticweb.ruqar.rules.Term

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