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YASE is a text indexing and retrieval system (search engine). It is designed to process large collections easily. All words are indexed and can be optionally stemmed. The query tool supports searching all/any terms and can rank query results by relevance using the cosine measure. YASE can be customised to read various types of documents by providing a suitable filter to extract text from the document. It can also scan existing directory structures or Web sites for documents. A single database can refer to files in multiple directories or Web site. Last, the program is easy to use because there are only two commands: one to build a database, and the other to query it.


User guide available from; Programmer command reference available from


Download version 1.0.8a (beta)
released on 10 April 2001


Related Projects


LicenseVerified byVerified onNotes
GPLv2orlaterJanet Casey10 April 2001

Leaders and contributors

Dibyendu Majumdar Maintainer

Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support E-mail

Software prerequisites

Kind Description
Required to build make

This entry (in part or in whole) was last reviewed on 30 April 2003.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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