| http://www.w3.org/ns/prov#value | - What I mean by that is practically nobody in the www / popular press ever points out that the equivalent in algebraic terms ( or in FOL style, with the appropriate changes in terminology ) of a relation with a so-called primary key is a projection of a join of one or more relations with extended headings.My complaint is that people often treat such a language keyword as if the relation it applies
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