Another index, or a different field in the same index but without the modified gaps. Maybe PerFieldAnalyzerWrapper would help - one Analyzer for field x with modified gaps and a different one for field y with standard gaps.
-- Ian. On Fri, Mar 4, 2011 at 2:40 PM, Michael Wiegand <michael.wieg...@lsv.uni-saarland.de> wrote: > Thank you for all these useful hints! > > If I use the multi-valued fields in combination with "modified" position > increments, I would actually distort the shape of a document. > For instance, if I would like to compare a retrieval enforcing query term > co-occurrence within the same sentence with a co-occurrence using > PhraseQuery (or SpanNearQuery) just enforcing that the query terms have to > appear within a text window of n words (also allowing this window to cross > sentence boundaries), I would need to create another index where I do not > modify the position increments. > Is that right? > > Best, > Michael > > Ian Lea schrieb: >> >> You can use multi valued fields if you play with the position >> increment gap. See e.g. >> >> http://lucene.472066.n3.nabble.com/Problem-searching-in-the-same-sentence-td1501269.html >> >> A google search for "lucene indexing sentences" or similar finds that, and >> more. >> >> >> Different docs can have different fields/different numbers of fields, >> but the position gap approach is probably better. >> >> >> -- >> Ian. >> >> >> On Fri, Mar 4, 2011 at 7:06 AM, Michael Wiegand >> <michael.wieg...@lsv.uni-saarland.de> wrote: >> >>> >>> Hi, >>> >>> I would like to create an index with Lucene to a document collections of >>> text files. >>> The index should be created in such a way, that for the search I can >>> enforce >>> that query term A and query term B are contained within the same >>> sentence. >>> >>> How should implement the index? Should I have for every sentence a >>> different >>> field (but make sure that it is not a multi-valued field because they >>> would >>> get merged which is exactly what I do not want)? >>> Would it be problematic that different documents would then end up having >>> different numbes of fields? >>> >>> Thank you in advance! >>> >>> Best, >>> Michael >>> >>> >>> --------------------------------------------------------------------- >>> 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 > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
