Welcome

After more than ten years, the project is leaving the area of full-text search engines. The next version, Egothor 3, will be a novel universal database system. The software is already under heavy development.

Previous software packages and documents are moved to egothor.sf.net. This migration process is not yet completed.

Egothor v1 and v2

Egothor v1 and v2 are Open Source, high-performance, full-featured text search engines written entirely in Java. It is technology suitable for nearly any application that requires full-text search, especially cross-platform. It can be configured as a standalone engine, metasearcher, peer-to-peer HUB, and, moreover, it can be used as a library for an application that needs full-text search.

  • Written in JAVA for cross platform compatibility.
  • New dynamization algorithm for fast index updating.
  • Fully 64-bit kernel
  • Transactions (ACID)
  • Plagiarism detection
  • Document revisions, Xdelta
  • Incremental updates
  • Queries can be solved in a parallel manner
  • Able to recognize the most familiar file formats: HTML, PDF, PS, and Microsoft's DOC, and XLS.
  • High capacity robot which supports robots.txt recommendation.
  • The best compression methods are used, i.e. Golomb, Elias-Gamma, Block coding.
  • Based on the extended Boolean model which can operate as the Vector or Boolean models.
  • Universal stemmer that processes any language.

History

Egothor v1 tried to solve an issue of fragments related to index maintenance. It also developed a universal stemmer that was able to process any language.

The next version (v2) was partially developed by students of the Faculty of Mathematics and Physics, Charles University in Prague.
They implemented a couple of interesting components, and tested the system in several specific configurations.

After 10 years, the head developer decided to start from scratch, using a quite different approach. The upcoming release is planned for the next year.