I am pleased to announce the release of TextIndexNG 2.0 alpha1 . What's new in TextIndexNG 2.0? - Relevance ranking of search results added. Searches are now ranked using an extended cosine measure. The cosine measure is based on a vector model and calculates the document "score" based on the frequency of the query terms inside the document result set. - Much faster phrase/near search: the old implementation of TextIndexNG had to perform a very expensive job at query time when phrase/near search was performed. Re-using the !WidCode module of !ZCTextIndex made this operation less expensive. - Left-truncation added: TextIndexNG can be configured creation-time time to support left-truncation (means you can search for "*suffix") - optional auto-expansion support: This optional feature also to get better search results when some of the query terms could not be found. The index expands a query term "foo" to "foo*" if there was no hit for "foo". This expansion is currently global for the index. This feature will be available on a per-query basis in a later version. (Auto-expansion will be extended in a later version to search for similiar terms) - improved HTML converter: now using Chris Withers "Strip-o-Gram" module instead of the Strip-Tag-Parser - added converter for text/sgml - Similarity search (soundex, metaphone, doublemetaphone) dropped and replace with a more general approach and language indepedant approach using the Levenshtein distance. - internal code cleanup, more unittests Not implemented yet - improved support for multilingual documents - range searches like "Fi..Foo" - substring searches "*substring*" - optional improved ranking for terms based on their relative positions inside a document Installation notes TextIndexNG 2.0 is *not compatible* with TextIndexNG 1.0 so there is currently no migration path for existing indexes. - **BACKUP YOUR Data.fs first!!!** - remove any existing TextIndexNG from your ZCatalog indexes - shutdown Zope - remove the old Products/TextIndexNG directory - untar the tarball in the Products folder - recompile and install extension modules (see InstallationInstructions) - restart Zope - re-create the indexes and re-index Download: http://sourceforge.net/project/showfiles.php?group_id=50052 Project Wiki: http://www.zope.org/Members/ajung/TextIndexNG/