ref: a0b7b3ecbbcf24a3c79ac91f8fbf6d5c0ddd7710 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)