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Quasi-inverses of schema mappings

... the exact semantics of this operator turned out to be a fairly delicate task. Furthermore, this notion is rather restrictive, since it is rare that a schema mapping possesses an inverse. In this paper, we introduce and study ...

Publication - huliganka - 04/17/2013 - 02:49 - 0 comments - 1 attachment

Inverting Schema Mappings

... Fagin2006InvertingSchema.pdf 433.52 KB A schema mapping is a specification that describes how data structured under one schema (the ...

Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment