The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2010
Filed:
Jan. 07, 2008
Ronald Fagin, Los Gatos, CA (US);
Phokion Gerasimos Kolaitis, Los Altos, CA (US);
Lucian Popa, San Jose, CA (US);
Wang-chiew Tan, San Jose, CA (US);
Ronald Fagin, Los Gatos, CA (US);
Phokion Gerasimos Kolaitis, Los Altos, CA (US);
Lucian Popa, San Jose, CA (US);
Wang-Chiew Tan, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for processing a schema mapping M from a source schema S to a target schema T by executing program code on a processor of a computer system. A schema mapping M' from T to S is determined via processing the schema mapping M. The schema mapping M includes at least one constraint σ. Each constraint σ consists of a source-to-target tuple-generating dependencies (s-t tgd). The schema mapping M′ includes at least one constraint σ′. Each constraint σ′ consists of a disjunctive tgd with constants and inequalities among the constants. The schema mapping M′ is stored in at least one computer usable storage device of the computer system and/or is outputted in at least one output device of the computer system.