On 26/02/2016 11:37, Ulrike Fischer wrote:
> Am Fri, 26 Feb 2016 11:27:01 +0000 schrieb Joseph Wright:
>> New prefixes registered as detailed below.
> which triggered me to look at the list.
> https://github.com/latex3/latex3/blob/master/l3kernel/l3prefixes.csv
> And imho in my case the order is wrong (the prefix is UF and the
> package citeall). Also my name is not written correctly. 

Correct, though looking at the code the prefix is "UFca" (which is what
I've put).

> It also reminds me of a question: Is there a prefix pattern which
> will never be registered so that one can safely use it in
> local/private definitions?

We can only *ask* we can't *tell*, but I'd probably strongly discourage
"foo", "tmp", "local", "mypkg" and similar 'throw away' prefixes. I'll
see if the team feel we should register a prefix specifically for this
purpose ('Local additions not to be distributed').