Thanks for the link Andy, @Elie my specific use case is this:
I have millions of records with perhaps 100 unique attributes across the records. Individual records may only have 5-10 attributes though. So a user who wishes to browse the data based on attributes can progressively filter the data to find individual or groups of records. When a user selects a facet, only those (additional) facets for which records exist are displayed as options, along with counts. It is possible with regular SPARQL GROUP BY and COUNT queries but not so performant. Cheers On Tue, Feb 14, 2023 at 2:58 AM Andy Seaborne <[email protected]> wrote: > > > On 13/02/2023 12:59, David Habgood wrote: > > Hi Jena Users, > > > > I'm interested in extending the Jena Lucene capabilities to include > > Lucene's faceted search ( > > https://javadoc.io/doc/org.apache.lucene/lucene-facet/latest/index.html > ). > > > https://lucene.apache.org/core/9_5_0/demo/org/apache/lucene/demo/facet/package-summary.html > > > > > > As far as I can tell from searching the mailing list (and github) the > > Lucene faceted search capability hasn't been exposed in Jena before. > > > > I think it could be exposed as follows: > > 1. Defining how faceted search concepts can be expressed in the Jena > > dataset configuration > > 2. Extending the current indexing code to also generate the facet index > > based on definitions in 1. > > 3. Adding a new query function for faceted search e.g. text:facet > > > > Keen to hear if anyone can see issues with this approach or has other > > feedback. > > > > Thanks > > David > > >
