Well, it could be a facet search, if there would be tags available but if you just wanna have a "tag cloud" generated by full-text, I don't see how a facet search could help to generate this cloud. Unfortunatelly, I don't have tags in my data. What I need is the information, what are the most used terms (or multi terms) in this data. First I have thought of using carrot2, which uses a specialed clustering algorithm. But I have wondered, if it is not possible to get the most used terms out of lucene directly.
Glen has mentioned, that he is doing this for full-text data. He mentioned that he is using the IndexReader.termDocs(Term term) method. So I think he iterates all terms and looks in how many documents this term exists. But what I don't see is: how does this method work with a filter? Do you first look for all documents which are valid for the used filter and than iterate all terms only counting documents in this filtered set? I cannot imagine, that this is performant because I have more than 10 mio documents (fast growing). Mathias 2009/11/6 Chris Lu <chris...@gmail.com>: > Isn't the tag cloud just another facet search? Only difference is the tag is > multi-valued. > > Basically just go through the search results and find all unique tag values. > > -- > Chris Lu > ------------------------- > Instant Scalable Full-Text Search On Any Database/Application > site: http://www.dbsight.net > demo: http://search.dbsight.com > Lucene Database Search in 3 minutes: > http://wiki.dbsight.com/index.php?title=Create_Lucene_Database_Search_in_3_minutes > DBSight customer, a shopping comparison site, (anonymous per request) got > 2.6 Million Euro funding! > > > Mathias Bank wrote: >> >> Hi, >> >> I want to calculate a tag cload for search results. I have seen, that >> it is possible to extract the top 20 words out of the lucene index. Is >> there also a possibility to extract the top 20 words out of search >> results (or filter results) in lucene? >> >> Mathias >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
