Script Fields
The Script Fields lists all the metadata fields that can be used in the script.
The first list refers to the value of the metadata fields in the song being modified.
The second list refers to the values of the linked MusicBrainz album, so this allows us to get the original MusicBrainz values rather than the values stored in the song itself. This only has any effect if our song is linked to a MusicBrainz release by having a MB Track Id and MB Release Id
The third list refers to the value of the linked Discogs album so this allows us to get the original Discogs values rather than the values stored in the song itself. This only has any effect if our song is linked to a Discogs release by having a URl Discogs Release and matching discno/trackno to a track on the linked release.
The button to the right of the list add a version of the selected field to the script.
Simple
Adds the field, if the field contains multiple values they will all be returned separated by three semi-colons.
1st Value
Useful for fields with multiple values, adds only the 1st value for the field, only available for fields that can hold multiple values.
2nd Value
Useful for fields with multiple values, adds only the 2nd value for the field, only available for fields that can hold multiple values.