How to get a list of all current tags from a mp3 file?

Well, I reply to myself, got this so far ...

Mp3tag Tag Dump Row

$filename(Mp3tag.tagdump.row.txt,ANSI)$loop(%_path%)^|_MD5AUDIO:''%_md5audio%''|_MD5:''%_md5%''|_PATH:''%_path%''|$regexp($list(,:'',''|),\r\n,U+000DU+000A)$$$char(13)$char(10)$loopend()

Mp3tag Tag Dump Col

$filename(Mp3tag.tagdump.col.txt,ANSI)$loop(%_path%)^
_MD5AUDIO:''%_md5audio%''
_MD5:''%_md5%''
_PATH:''%_path%''
$regexp($regexp($list(,:'',''$char(13)_$char(10)),\r\n,U+000DU+000A),\r_\n,\r\n)$$

$loopend()

... first steps to support development of a handy backup/restore environment for Mp3tag?

DD.20070304.2342