does solr handle hierarchical facets?

[Sean Laval]

eg. category/subcategory/subsubcategory?
 
such that if you search for category, you get all those documents that have 
been tagged with the category AND any sub categories. If this is possible I 
think I'll investigate using solr in place of some existing code we have that 
deals with indexing and searching of such data.
 
Regards,
 
Sean
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