template file ready for the user to edit in case there's
no correct match.
+datasource.X- text label for the source of the data in cddbread.X,
+ e.g. "cddb" or "Musicbrainz". Generated by the data
+ lookup methods, then used later if we care where the
+ data came from.
+
+cddbquery.X - Summary of a single disc lookup result. Based on the
+ complicated format used by *cddb*, but without the
+ result code. Generated by the data lookup methods, then
+ used later to fabricate a composite cddbquery file.
+
cddbquery - result code and summary of a disc lookup. Based on the
format used by *cddb*, and faked up by the other lookup
methods. A single successful match will look like: