On Sat, 24 Jan 2009, Jonno Downes wrote:

> howdy,
>
> I'm playing with some code where it will be handy for me to have on a
> modern file system (e.g. ntfs) some files exported from Apple DOS 3.3
> disk images, but I'd like to retain the 'file type' metadata when I do
> that.
>
> More specifically, I want to recognise 1) that the files are Apple 2
> files, and 2) differentiate between Binary files (with the first 4
> bytes being load address and file length), Applesoft files, Text files
> etc.
>
> The only cross-platform place for storing file metadata is in the file
> extension, but there doesn't seem to be any convention or standard
> file extension used for this purpose - BIN and BAS are too generic.
>
> I am considering using .?33, where the first char is the DOS 3.3 file
> type (i.e. a binary file will get saved with extension .B33, an
> Applesoft file will get .A33 etc).
>
> But is anyone aware of unique extensions already being used for this
> purpose?
>

These aren't common or standard by any means but I've used .PG2 for DOS 
3.3 binary files for several years, and use .FP for Applesoft files.

-uso.
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