File Types and Creator Codes

Sarah Reichelt sarah.reichelt at
Fri Sep 25 23:09:35 EDT 2009

On Sat, Sep 26, 2009 at 10:38 AM, J. Landman Gay
<jacque at> wrote:
> Sarah Reichelt wrote:
>> Since this (like creator codes) depends on software developers setting
>> up the right links, we need the RunRev standalone builder to start
>> giving us the option to define a UTI for our apps, as well as, or
>> instead of a creator code & file type.
> The SB has an entry for a "bundle identifier" which I thought was the same
> thing. Or is that different?

I THINK that's different, but I don't really know. However here is how
I think it works...

Imagine you have an app that creates HTML files.
You might want to just let the default browser handle them, so you
would need a UTI with "public.html"
If you wanted these files to open your app when double-clicked (even
though they were standard HTML files that would work in a browser),
you would need to set up your own UTI of say
The same app might also produce text files, so you would also need a
UTI with "com.mydomain.myapp.plain-text".

The bundle identifier looks to be in the same sort of format, but you
an only have one per app, and I don't think you would want it to be
something completely general like "public.html".


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