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Filename extensions for new apps

T

teddymines

Senior member
When a software company creates an app that reads or writes files in a proprietary format, how do they pick filename extensions? The danger I see is that they might pick one that is already in use, and there would be a registry conflict. Of course they would stay away from the common ones such as .DOC and .TXT, but how about a .GWF or .KCF file?

Is there a registration process to "lock in" an extension with an application?
 
Not that I know of. It really doesn't matter anyway, considering you have the option of what program to use to open the file using right click.
 
Far as I can tell it's a free for all, with people avoiding very commonly used ones.

There would be no registry conflict, the installer would just just overwrite the old association =)
 
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