Zebra

Zebra is a high-performance, general-purpose structured text indexing and retrieval engine. It reads structured records in a variety of input formats (eg. email, XML, MARC) and allows access to them through exact boolean search expressions and relevance-ranked free-text queries.

(It's also a Linux-based routing package. [L1 ] -- CLN 2006-08-17)

Zebra supports large databases (more than ten gigabytes of data, tens of millions of records). It supports incremental, safe database updates on live systems. You can access data stored in Zebra using a variety of Index Data tools (eg. YAZ and PHP/YAZ) as well as commercial and freeware Z39.50 clients and toolkits.

Zebra is free software, available under the GPL license. It may be used by anyone without charge.

Uses embedded Tcl interpreter for scripted filtering of data. Tk GUI also available.

Available at: [L2 ]