ref: 8e9d2434e97fe6cf4b0d3e7f43e3e35d7ae1033f dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)