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Data Integration in Infomaster

Computational Logic Lecture 5. Data Integration in Infomaster. Michael Genesereth Autumn 2001. Multiple Rule Formats. Epilog/Prolog QBE KIF. QBE Rules. File Loading. Files loaded form location to internal “agent”

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Data Integration in Infomaster

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  1. Computational Logic Lecture 5 Data Integrationin Infomaster Michael Genesereth Autumn 2001

  2. Multiple Rule Formats Epilog/Prolog QBE KIF

  3. QBE Rules

  4. File Loading Files loaded form location to internal “agent” in language with or without metadata generation

  5. Manual Transformation Transforms have preconditions and assertions. Preconditions are evaluated before transform applied. After substituting varible bindings, assertions are made.

  6. Rules Rules superior to transformation since they can be used over and over again.

  7. Reality Problem - Lack of Structure in databases Databases largely strings without fixed structure e.g. 4 in white and black widget w/ gold flanges Solution - growing support for XML Problem - Noise/Errors in database Incorrect spellings, missing information, inconsistencies Solution - growing support for “semantic” db systems

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