ref: 2ae2e5f856f8f95f8d780f9ffe0a0ebb634ffb1a dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)