You can use a dynamic field called "tag_*". If a patch for SOLR 247<https://issues.apache.org/jira/browse/SOLR-247>gets committed, you can perform a facet query like facet.field=tag_*.
Cheers Avlesh On Fri, Aug 21, 2009 at 3:21 AM, Asif Rahman <a...@newscred.com> wrote: > Is there any way to assign metadata to terms in a field and then filter on > that metadata when using that field as a facet? > > For example, I have a collection of news articles in my index. Each > article > has a field that contains tags based on the topics discussed in the > article. An article might have the tags "Barack Obama" and "Chicago". I > want to assign metadata describing what type of entity each tag is. For > these tags the metadata would be "person" for "Barack Obama" and "place" > for > "Chicago". Then I want to issue a facet query that returns only "person" > facets. > > I can think of two possible solutions for this, both with shortcomings. > > 1) I could create a field for each metadata category. So the schema would > have the fields "tag_person" and "tag_place". The problem with this method > is that I am limited to filtering by a single criterion for each of my > queries. > > 2) I could leave the Solr schema unmodified and post-process the query. > This solution is less elegant than one that could be completely contained > within Solr. I also imagine that it would be less performant. > > Any thoughts? > > Thanks in advance, > > Asif > > -- > Asif Rahman > Lead Engineer - NewsCred > a...@newscred.com > http://platform.newscred.com >
