Complicated Field Editing Format

[ohrenkino]

It looks as though the forum formatter has swallowed some of the characters.
I found another thread that also deals with duplications:

Merge duplicate words

You want to keep the first value. That's more complicated. [Edit:] Action: Format value Field: Genre Format string: $regexp($reverse($regexp($regexp($reverse($regexp($regexp(%Genre%,'^(\s+;*|\s*;+)+|(\s+;*|\s*;+)+$|((?<=;)\s+)|(\s+(?=;))',),'^|$',';')),'(;[^;]+)(?=(\1|;.*?\1))',),'^;+|;+$',)),'(?<=;)',' ') Replace Genre with any other tag and it will remove duplicates too. This action "fixes" first the multiple value string (remove multiple spaces after ; separator). It will add exac…

it uses the semicolon as separator, so I used it for the $meta_sep()
and it suggests such a
Format string: $regexp($reverse($regexp($regexp($reverse($regexp($regexp($meta_sep(artist,;),'^(\s+;|\s;+)+|(\s+;|\s;+)+$|((?<=;)\s+)|(\s+(?=;))',),'^|$',';')),'(;[^;]+)(?=(\1|;.*?\1))',),'^;+|;+$',)),'(?<=;)',' ')