Hi Andy,
It sounds like you may want to have a look at tree faceting: https://issues.apache.org/jira/browse/SOLR-792 > Date: Mon, 1 Mar 2010 18:23:51 -0800 > From: angelf...@yahoo.com > Subject: Implementing hierarchical facet > To: solr-user@lucene.apache.org > > I read that a simple way to implement hierarchical facet is to concatenate > strings with a separator. Something like "level1>level2>level3" with ">" as > the separator. > > A problem with this approach is that the number of facet values will greatly > increase. > > For example I have a facet "Location" with the hierarchy country>state>city. > Using the above approach every single city will lead to a separate facet > value. With tens of thousands of cities in the world the response from Solr > will be huge. And then on the client side I'd have to loop through all the > facet values and combine those with the same country into a single value. > > Ideally Solr would be "aware" of the hierarchy structure and send back > responses accordingly. So at level 1 Solr will send back facet values based > on country (100 or so values). Level 2 the facet values will be based on the > states within the selected country (a few dozen values). Next level will be > cities within that state. and so on. > > Is it possible to implement hierarchical facet this way using Solr? > > > > _________________________________________________________________ Tell us your greatest, weirdest and funniest Hotmail stories http://clk.atdmt.com/UKM/go/195013117/direct/01/
