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Here is a quick tool that uses an undocumented API call to list all declared UniformTypeIdentifiers. It could easily be rewritten to use CoreFoundation instead of Objective-C, but I’m too lazy to do it. Feel free to do it for me and post it here. –WAHa

#include <Foundation/Foundation.h>

NSArray *_UTCopyDeclaredTypeIdentifiers();

int main() { NSAutoreleasePool *pool=[[NSAutoreleasePool alloc] init]; NSArray *types=_UTCopyDeclaredTypeIdentifiers(); int i;

for(i=0;i<[types count];i++)
	printf("%s\n",types objectAtIndex:i] UTF8String]);

return 0; }

You build it with the following command line:

gcc -o lstypes lstypes.m -framework Foundation -framework Carbon

There is also a Perl script that uses this to [[ExportTypeIdentifiers.