I'm very new to VO stuff.  My first impression seeing this was that `'conesearch_good'` is a toy example.  I was able to see from the next example that it is not, but some explanation might be useful.  From looking at this more and glancing around the code I infer that this represents a specific nomenclature for "conesearch sites that have been validated".  I see there could be `conesearch_warn` or `conesearch_error` for sites that don't validate cleanly.