On 19 Sep 2014, at 7:43 pm, Daryle Walker <dary...@mac.com> wrote:

> Long ago, in the 1990s, I remember there was some web page on Apple’s server 
> that let you register a four-character type code, for either type or creator. 
> I’ve been trying to find it lately. I sometimes found references that could 
> be it, but following the link either went to the Apple Developer search page 
> that Apple uses for resource-not-found errors or went to the UTI guide, 
> neither of which help.
> 
> Is there a version of the page still around? I want to use a vanity creator 
> code in my Info.plist, but I want to ensure uniqueness if the code is still 
> used for matching. If the code is ignored nowadays, can I put a vanity value 
> there, or do I have to keep it “????”? I noticed (due to work in another 
> thread) that Safari has a creator code (“sfri”), and I think TextEdit reuses 
> TeachText/SimpleText’s creator code (“ttxt”).


AFAIK, those codes are not used anywhere by OS X, and you can put what you like 
there. In theory the code might be used by a Carbon app running in a very old 
version of Mac OS (e.g. Classic environment or pre OS-X) but I expect you can 
count the number of those systems still running on the fingers of one hand.

Certainly registering codes is no longer done, so I doubt there's any way to do 
it. Maybe there's a dust-laden cobweb strewn room somewhere in Apple's 
basement, long forgotten, where a lonely phone rings whenever someone tries to 
register a creator code, but the guy that used to answer it has long since died 
and nobody's noticed yet.

--Graham



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