I see, ok. Thanks to both of you! On Thu, Aug 21, 2008 at 4:51 PM, Michael McCandless < [EMAIL PROTECTED]> wrote:
> > Also, the inverted index *will* store positional information (in the *.prx > files) even if term vectors are not stored. > > Mike > > > Yonik Seeley wrote: > > On Thu, Aug 21, 2008 at 7:20 PM, David Lee <[EMAIL PROTECTED]> wrote: >> >>> Clarification question: >>> >>> If I don't store term vectors, then I: >>> -- won't have information on the position of matching terms >>> -- I don't have the term frequency vector >>> >>> -- but I should still have the frequency of terms per document in the >>> .frq >>> file, right? >>> >>> So what's the difference between the term frequency vector and the >>> information saved in the .frq file? >>> >> >> It's how the data can be efficiently accessed... by term or by document. >> Lucene is naturally an inverted index, and thus makes it easy to ask >> "what documents contain this term". >> Term vectors store the term information indexed by document and make >> it easy to ask "what terms does this specific document have". >> >> -Yonik >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- David T. Lee www.davidtlee.net
