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The Gwen Open Source project offers a database search engine. It provides a Boolean query evaluation layer that sits above a database layer and beneath a Z39.50 layer. A Gwen-to-Pears interface is provided as well as a program demonstrating the use of the search engine.


This software may be used without charge in accord with the terms of the OCLC Research Public License. A PDF version of the license also is available. (PDF:130K/3pp.)

As of 2006 we are issuing software under the Apache License, Version 2.0.

If you would like to use this software under the Apache license, please contact us and we may be able to update the software to use the Apache license.


The Gwen code in the CVS repository is divided into modules for ease of retrieval.

The modules are:

  1. all - all the code,
  2. gwen - classes implement database search engine
  3. pearsgwen - classes implement a gwen to pears interface.

You may click below to download the complete Gwen code for use or evaluation, without using CVS. This download is Release 1.1.

View: Readme Demo    
Download: Sources Documentation Classes Sample DB


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