On Thu, 10 Jul 2003, Keith Packard wrote:

>Date: Thu, 10 Jul 2003 09:15:17 -0700
>From: Keith Packard <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Cc: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]
>Reply-To: [EMAIL PROTECTED]
>Content-Type: text/plain; charset=us-ascii
>Subject: Re: Choosing an extension for bitmap-only SFNTs 
>
>Around 1 o'clock on Jul 10, Juliusz Chroboczek wrote:
>
>> I suggest they should have the extension ``.sfnt'', with ``.sfn''
>> being recognised for compatibility with 8+3 systems.
>
>While using four letter extensions would be nice, I'm afraid there remain 
>file system formats which provide for only three letters that are commonly 
>used in systems which run X.  Floppies, flash cards and other devices 
>continue to use FAT file systems, and while there are kludges around to 
>provide long file names, those aren't always well supported nor compatible.
>
>So, if we accept only a four letter extension we will have "issues" 
>distributing fonts on floppies, flash cards and USB keychain drives.
>
>Juliusz suggests accepting either .sfnt or .sfn to work around this 
>problem.  That's how the world deals with the .html extension -- software 
>all "knows" that .html and .htm are equivalent.  I'd rather avoid this 
>complexity in every new piece of software that deals with fonts (not that 
>fontconfig or FreeType really care, but other pieces of software do).
>
>Instead, I think we can probably come up with a single three letter 
>extension to use; perhaps something like:
>
>       .ttb            - true type 'bitmap' font
>       .otb            - open type 'bitmap' font
>       .tts            - true type 'sfnt' font
>       .ots            - open type 'sfnt' font
>
>.otb appears to be used for Nokia Phone Graphics files of some kind and 
>.ots appears used by the OtsJuke application for sound files, but neither 
>.ttb nor .tts appear used at the current time.
>
>This is certainly not intended to be an exhaustive list of possibilities, 
>but I would like to limit discussion to viable three letter extensions.
>
>I agree with Andrew C Aitchison that the .sfn extension is probably a bad 
>idea, both because it may be easily confused with .snf and also because 
>SPX Fonts already use the .sfn extension.

Yeah, just checked on:

http://filext.com/detaillist.php?extdetail=.sfn&Submit2=Go%21

-- 
Mike A. Harris


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