Hi Aliaksandr, Aliaksandr Radzivanovich wrote: > What if I need to search for synonyms, but synonyms can be expanded to > phrases of several words? > For example, user enters query "tcp", then my application should also > find documents containing phrase "Transmission Control Protocol". And > conversely, user enters "Transmission Control Protocol", then my > application should also find documents with word "tcp".
Section 4.6 of Gospodnetić & Hatcher's excellent _Lucene_in_Action_[1] describes a SynonymAnalyzer class, intended for use at indexing time (AFACT, however, their approach does not address multi-word synonyms). Although a query-time analyzer is not directly discussed, they do say (on p. 134): The awkwardly named PhrasePrefixQuery (see section 5.2) is one option to consider, perhaps created through an overridden QueryParser.getFieldQuery method; this is a possible option to explore if you wish to implement synonym injection at query time. Steve [1] http://lucenebook.com/ -- Steve Rowe Center for Natural Language Processing http://www.cnlp.org/tech/lucene.asp --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
