| http://www.w3.org/ns/prov#value | - n so that the expression is a numerical or character type. [0040] The significance of simple rule conditions is that (1) simple rule conditions are internally indexed by the rules engine; (2) simple rule conditions can be evaluated without executing SQL; and (3) simple rules can be evaluated with partial data, described further below. [0041] In an implementation, for table columns, variables, and
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