The strength of this package is to index all sorts of things (websites, file systems, files, databases tables, ...). feed the indexer with information, and later query it. features: Boolean search operators like + - (and, not). Search for "fixed names" (eg "Bill Gates"). Stemming, metaphone, soundex, fast part-word searches like foo*, foo*bar AND *foo. Foreign keys (for db-related indexes). Stopword lists (multilingual). built-in mime-type handlers for html, pdf, doc and xls, ...