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Heuristic co-identification of objects across heterogeneous information sources

  • US 5,895,465 A
  • Filed: 09/09/1997
  • Issued: 04/20/1999
  • Est. Priority Date: 09/09/1997
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method for generating a database query language request for performing a join between a plurality of database tables including a first database table and a second database table, the first table having a first plurality of fields and the second database table having a second plurality of fields, each one of the plurality of fields having a particular meaning, the method comprising the steps of:

  • (a) providing a plurality of expressions that communicate the meaning of each of the fields in the first and second plurality of fields;

    (b) receiving a query requesting information, the query including a conjunction of literals;

    (c) mapping each of the literals to all matching expressions to provide a list of fields to be queried, the list of fields including a first field from the first table and a second field from the second table, wherein the mapping indicates that the first and second fields have the same meaning; and

    (d) generating the database query language request using the list of fields, such that the database query language request includes a join between the first and second fields.

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