Hi, Sorry if this question is misplaced in this mailing list. If there is a mailing list that is more specifically focussed on the gbif webservices API, I’d be very grateful that you would give me the address of the list ( I’ve looked but haven’t been able to find one). I’d like to know how to define a request with more that one filtering criteria in the gbif density data service. For instance, the following request extracts a kml density file of all occurrences in Canada http://data.gbif.org/ws/rest/density/list?originisocountrycode=CA&format=kml However if I add the constraint that the occurrences come from the OBIS network: http://data.gbif.org/ws/rest/density/list?resourcenetworkkey=3&originisocoun... only one constraint is taken into account (resourcenetworkkey), the originisocountrycode is disregarded. Is there any way of combining several filters in a density request? Thanks very much. saikari