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OpenFTS provides an interface to parsers, dictionaries and ranking. Currently, we use relcov function which uses coordinate information to judge which document is better conforms to query - in general, document with closer appearance of query terms gets higher rank. Also, there is a crude implementation to assign a higher rank to document with query terms in it's title. To rank collection of html documents we need more sophisticated relevance function to assign different weights to terms in headings, boldings, etc.