RFE: Facet on collections and uris

[hunterhacker]

It'd be good for people to be able to facet on collections and uris, and use them like they'd use any other range index value. This lets people get the collections or URIs that match a query without touching the disk. Perhaps we should have people enable them like they do ranges?

[collwhit]

You might look at search API re: collections facet support. It allows you to specify a prefix, so that you can facet on collections that look like /mycollection/a /mycollection/b as a and b.