ref: 3f9d5e4a4f9e4f0b5fe66e4a6745a4b8c5f6e447 dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)