Search: in, Model Management, Fagin, R

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Composing Schema Mappings: Second-Order Dependencies to the Rescue

... effect as applying successively the two schema mappings. In this paper, we give a rigorous semantics to the composition of schema ... We first study the important case of schema mappings in which the specification is given by a finite set of source-to-target ...

Publication - cat - 04/16/2013 - 19:16 - 0 comments - 1 attachment

Inverting Schema Mappings

... of interest arises when S is the class of all instances, in which case an S-inverse is a global inverse. We focus on the important ... we show how to construct an S-inverse when one exists. In particular, we show how to construct a global inverse when one exists. ...

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

Schema mapping evolution through composition and inversion

... of schema mappings is laborious and time-consuming, even in the presence of tools that facilitate this development. At the same time, ... the adaptation and reuse of the existing schema mappings in the context of the new schemas is an important research problem. In ...

Publication - cat - 04/16/2013 - 12:16 - 0 comments - 0 attachments