Plugin idea: Tag songs from an album that are avalable as a single

[dns53]

As there is an "associated singles/EPs" relationship between two release groups it woud be good to use this relationship and tag recordings some how.

Look up the relationships on the current release group.
Find any associated singles/EPs relationships.
if the release group name of this single matches a recording name add a tag.

not sure what the tag should be, is_single: true or something.

[Sophist-UK]

For performance reasons this would only make sense if the related single track can be identified from the metadata returned as standard bt MusicBrainz. If you need to make one or more additional calls per album or worse still per track, this would have a significant performance impact.