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Table of Contents

Relational Indexing Implementation in Current LexEVS

All Documents have a unique document Id that identifies them as "the same" entity, but the boundary docs provide additional evidence that they are the start and finish of a set of documents all related to the same concept by providing a "CodeBoundary" identifier indicating this is the start or end of the document set for this entity representation.  This effectively flattens the entity to properties relationship by adding all entity information to each property document which includes up to 34 indexed fields and about 9 stored fields.

Proposed Relational Indexing Implementation under Lucene 5.0.0

Lucene provides support for limited relational expression starting with Lucene 3.4.  A single level parent/child relationship can be maintained as a one to many relationship between one document and several others.  This support provides LexEVS with an opportunity to improve index search times and reduce index size.

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