Key features - Support for http, https, ftp, nntp and news URL schemes. - htdb virtual URL scheme support for indexing SQL databases. - text/html, text/xml, text/plain, audio/mpeg (MP3) and image/gif MIME types built-in support. - External parsers support for other document types. - Ability to index multilangual sites using content negotiation. - Searching all of the word forms using ispell affixe