The filter interface has been frozen and it is safe to implement your own filters. There is a sample filter included in the source. Please send any filter implementations to the email address found at the bottom of this page. Also, if you translate the filter-interface to another language, please send me the interface definition so that I can post it so that others can benefit from it. How to create a filter of your own Forum - please post any questions you have regarding the implementation of custom filters in the filter forum .
Name Returns a string containing the name of the filter.
Url Returns a string containing the base url of the filter. Process This is to tell the filter to process the given document and extract any query-information found. If you can't get the genre, pass nil or an empty string as the parameter. Post feedback in one of the forums.