Filenames with 2 hyphens
"$len($regexp(%_filename%,'[^-]',))" IS 2
Filenames with at least 2 hyphens
"$len($regexp(%_filename%,'[^-]',))" GREATER 1
Track number is a single digit
track MATCHES ^\d$
Title tag starts with four capital letters
"$if($eql($regexp(%title%,^\u\u\u\u,),%title%),yes,no)" IS no