[aprssig] !x! (was: IS-to-RF proposal (rev b))

[Steve Dimse]

On Dec 30, 2011, at 10:50 AM, Lynn W. Deffenbaugh (Mr) wrote:

> Is this behavior documented somewhere?  Google really doesn't like searching for !x!

It is in the aprs spec 1.1 addendum

http://www.aprs.org/aprs11.html

though this only shows the shortened form !x!. x-no-archive is an internet standard flag and the original opt-out and is also accepted by findU (actually the test string is x-no-ar, so it can be shortened if desired).
> 
> And is it honored by other APRS-IS viewing implementations?

A quick check of LB9KE-7 shows aprs.fi ignores it and APRSWorld respects it (the latter has a posit from Dec 6 that did not include !x!). That aprs.fi never got called on it shows just how few people care.

Steve K4HG