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Search mechanisms using Lucene can become overburdened as increasing numbers of use cases make for a larger and more complex Lucene index.  When a use case as comprehensive as searching a an entire multi-source terminology service for a term , or fragment , is proposed, then a more restricted manner of approaching the problem is in order.  Furthermore the  use of the power of the LexEVS API becomes overkill, with the necessity of the union of large datasets prior to the effective query,  Subsequently, a more restricted approach is necessary.

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