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GAV-sound with conjunctive queries • Source and global schema as before: ◦ source R1(A, B), R2(B, C) ◦ Global schema: T1(A, C), T2(B, C) • GAV mappings become sound:
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Document Date: 2008-10-21 09:17:48
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File Size: 142,39 KB
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IndustryTerm
sound solution /
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Position
General /
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SocialTag
Formal languages
Rewriting
Mathematics
Information
Computer science
Conjunctive query
Database theory
Data integration