M. Une-algèbre-pour-le-langage, Les applications mapM, mapE, mapA, mapA? constituent des composantes fondamentales pour l'exploitation de MapAlgebra. Elles sont formellement définies de la manière suivante : 1. mapM, Soit m ? ? M, mapM(m ? ) = {m ? M | ? mL = (m, m ? , ?) ? L m }

. Dans-le-cas-de-la-plate-forme and . Dafoe, on a par exemple : mapE(TerminoOntology_Model,Class) = {TerminoConcept}. 3. mapA

?. E. Soient-e and ?. , On a: mapA?(e, a ? ) = {f ? F sem | (? mL = (m, eL, f) ? L a ) ? (m m ? ) ? (e dom(a ? ))}

. Dans-le-cas-de-la-plate-forme and . Dafoe, nous avons par exemple : mapA?(Term,relevance) = {'(frequency + variant_number)/100'}. En effet, ? aL 3 = ((frequency, variant_number), rate, 1 , '(frequency + variant_number)/100, eL 13 )? L a obtenu par composition des aLinks directs suivants

. Le-tableau-5, 21 illustre l'utilisation de l'opérateur MapINTERSECT

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