9. The method of claim 8 further comprising: generating output entries with CSV (Comma Separated Value) fields; and generating a reference to a plurality of output entries, the output entries defining a frame of data and responsive to an external application for receiving the frame; and generating, based on the catalog, CSV metadata indicative of the data types of the generated output entries, the external application responsive to the CSV metadata for receiving the plurality of output entries.
8. The method of claim 2 further comprising: generating, for each document in the collection, an output entry; the output entry including, for each of the computed field names: the data value corresponding to the computed field name, if the data value is populated; and an indication of a null value, if the data value is not populated; and a field terminator delineating each data value in the output entry.