Metacat

At this time, I think it is better to leave the two methods seperate. It is
cleaner to do it this way because even if there are no return fields, if the
query is successful certain fields (from xml_documents) will be returned. Also,
since each method is querying from a different table, combining the queries will
make the functionality less clear in the code and may result in a less efficient
query. We can revisit this at a later time if necessary.

Original Bugzilla ID was 97