Re: Registration of media typeimage/svg+xml

Chris Lilley <> Fri, 18 June 2010 10:58 UTC

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Date: Fri, 18 Jun 2010 12:55:07 +0200
From: Chris Lilley <>
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To: Paul Libbrecht <>
Subject: Re: Registration of media typeimage/svg+xml
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On Thursday, June 17, 2010, 9:09:32 PM, Paul wrote:

PL> Dear Chris,

PL> Could I suggest to add in this registration clipboard format names as
PL> part of the additional information so that applications use them  
PL> consistently?

Happy do do so - could you point to documentation on this so I can read up?

Do they require separate registration with some other authority, or is it sufficient to note them here?

PL> I would suggest the following for uncompressed svg as a first  
PL> approximation, but maybe there are existing attempts already?

PL> - Windows: "SVG Image"
PL> - MacOSX Uniform Type Identifier: org.w3c.svg conforms to public.image
PL> and to public.xml

PL> I am doubting that the 4-letter codes are still in use but I may be  
PL> wrong.

Yes, the old MacOS 4-letter codes are mainly historical at this point, but Apple did allocate them for us (back in 1998) and RFC 4288 (from Dec 2005) seems to ask for them if they exist, so they were included.

PL> paul

>>   Additional information:

>>        Magic number(s):

>>        File extension(s):
>>                svg, svgz (if gzip-compressed)

>>        Macintosh file type code(s):
>>                "svg " (all lowercase, with a space character as the
>>                fourth letter), "svgz" (all lowercase, if
>>                gzip-compressed).

 Chris Lilley          
 Technical Director, Interaction Domain
 W3C Graphics Activity Lead
 Co-Chair, W3C Hypertext CG