ref: 2c5dfc8dbd6cf36adedf1b4be35e49f8a8d5f3cf dir: /sys/lib/plumb/fileaddr/
addrelem='((#?[0-9]+)|(/[A-Za-z0-9_\^]+/?)|[.$])' addr=:($addrelem([,;+\-]$addrelem)*)