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Structural characterizations of schema-mapping languages

... this challenge that have received considerable attention in recent years are data exchange and data integration. The study of data ... database schemas. Schema mappings are typically expressed in declarative languages based on logical formalisms and are chosen with two ...

Publication - cat - 04/17/2013 - 11:16 - 0 comments - 1 attachment

An O(ND) Difference Algorithm and Its Variations

... A into B have long been known to be dual problems. In this paper, they are shown to be equivalent to finding a shortest/longest path in an edit graph. Using this perspective, a simple O(ND) time and space ...

Publication - huliganka - 04/16/2013 - 23:16 - 0 comments - 1 attachment

A General Formal Framework for Schema Transformation

... for integrating database schemas have been proposed in the literature, using various common data models (CDMs). As part of these ... have been defined that map between schemas which are in some sense equivalent. This paper describes a general framework for ...

Publication - huliganka - 04/16/2013 - 00:49 - 0 comments - 0 attachments