At the moment we have a hardcoded list of content model properties that can be selected to be faceted against. This needs to be replaced with a call to a Repository based REST service that retrieves all facetable properties in the content model.
Properties that are facetable are determined by a matrix of properties that indicates whether or not they can be selected. Support of this matrix has been implemented in Solr and we now need a REST service that queries for this information.
Andrew Hind [X] Can provide more information on what should be queried.