Convert fieldnames to uppercase

Hi,

I want all field names (title, artist, album, etc) to be uppercase (TITLE, ARTIST, ALBUM, ETC).

Can this be done by an action?

Silverwing

FAQ: How do I change upper/lower case of tag-fields or filenames? for the field _FIELDNAME if you want to change the actual fieldname (e.g., for Vorbis Comment in Ogg or FLAC).