Mark as singles
I have a directory of songs that were scanned from 45’s, so not part of an album. Can they be identified as such?
The word "album" is used a lot in music library management. However, in reality, in most cases, "album" means "release" - https://www.blisshq.com/music-library-management-blog/2013/08/06/album-name-think-release-name/
A single should basically be organised like an album. The ALBUM NAME tag should be filled with the name of the lead track (in double A sides this might be two tracks). Here're a couple of examples from MusicBrainz:
In theory, then, singles should be able to be identified, _however_ because of the lower number of tracks in the release, achieving a satisfactory confidence in the software might be more difficult.
In terms of actually marking a release or group of tracks as a single, this is up to you to define a field name - there are no commonly used field names for this purpose (that I know of). In which software do you want to see the releases separated by release "type"?(Edited by admin)