Rel is a program that determines the relevance of text documents to a set of keywords expressed in boolean infix notation. The list of file names that are relevant are printed to the standard output, in order of relevance. The boolean logical operators supported are, "&" for logical "and," "|" for logical "or," and "!" for logical "not." Parenthesis are used as grouping operators. Both phonetic and partial key searches are fully supported.
Release Notes: Two short procmail scripts have been added to the applications section to implement an enterprise email archive using qmail(1) as the MTA. There have been no bugfixes or documentation changes.
Release Notes: New Lotus Notes workalike e-mail archiving using Procmail/Smartlist and rel as the document relevance engine.
Release Notes: Initial stable version.