ref: 9d9ab0aad3a5e9123b43b9cf72b758d4ddcdcf2a dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)