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Re: [ietf-types] Registration of media typeimage/svg+xml
2010-11-30 11:16:53
On Tuesday, November 30, 2010, 9:19:33 AM, Julian wrote:
JR> OK, is there anything left to do? Or is this already on the way to IANA?
Re-reading Martin's latest comments, in a calmer frame of mind, there is merit
to his proposed wording. I'm going to check it a little and then send in a
(final? please?) last revision, likely tomorrow.
JR> Let's get this finished...
JR> On 25.11.2010 21:01, Ned Freed wrote:
Looks good to me as well.
Ned
This looks good to me. I hope this can move forward to the next step
(IESG approval?) soon, so that image/svg+xml can finally be properly
registered.
Regards, Martin.
On 2010/11/25 7:36, Chris Lilley wrote:
This is an updated registration request, incorporating the latest
round of feedback.
Type name:
image
Subtype name:
svg+xml
Required parameters:
None.
Optional parameters:
charset
Same as application/xml media type, as specified in [RFC3023] or
its successors.
Encoding considerations:
Same as for application/xml. See [RFC3023], section 3.2 or its
successors.
Security considerations:
As with other XML types and as noted in [RFC3023] section 10,
repeated expansion of maliciously constructed XML entities can be
used to consume large amounts of memory, which may cause XML
processors in constrained environments to fail.
Several SVG elements may cause arbitrary URIs to be referenced. In
this case, the security issues of [RFC3986], section 7, should be
considered.
In common with HTML, SVG documents may reference external media
such as images, audio, video, style sheets, and scripting
languages. Scripting languages are executable content. In this
case, the security considerations in the Media Type registrations
for those formats shall apply.
In addition, because of the extensibility features for SVG and of
XML in general, it is possible that "image/svg+xml" may describe
content that has security implications beyond those described
here. However, if the processor follows only the normative
semantics of the published specification, this content will be
outside the SVG namespace and shall be ignored. Only in the case
where the processor recognizes and processes the additional
content, or where further processing of that content is dispatched
to other processors, would security issues potentially arise. And
in that case, they would fall outside the domain of this
registration document.
Interoperability considerations:
The published specification describes processing semantics that
dictate behavior that must be followed when dealing with, among
other things, unrecognized elements and attributes, both in the
SVG namespace and in other namespaces.
Because SVG is extensible, conformant "image/svg+xml" processors
must expect that content received is well-formed XML, but it
cannot be guaranteed that the content is valid to a particular DTD
or Schema or that the processor will recognize all of the elements
and attributes in the document.
SVG has a published Test Suite and associated implementation
report showing which implementations passed which tests at the
time of the report. This information is periodically updated as
new tests are added or as implementations improve.
Published specification:
This media type registration is extracted from Appendix P of the
SVG 1.1 specification.
http://www.w3.org/TR/SVG/mimereg.html
Applications that use this media type:
SVG is used by Web browsers, often in conjunction with HTML; by
mobile phones and digital cameras, as a format for interchange of
graphical assets in desk top publishing, for industrial process
visualization, display signage, and many other applications which
require scalable static or interactive graphical capability.
Additional information:
Magic number(s):
File extension(s):
svg
Note that the extension 'svgz' is used as an alias for
'svg.gz' [RFC1952], i.e. octet streams of type image/svg+xml,
subsequently compressed with gzip.
Macintosh file type code(s):
"svg " (all lowercase, with a space character as the fourth letter).
Note that the Macintosh file type code 'svgz' (all lowercase)
is used as an alias for GZIP [RFC1952] compressed "svg ", i.e.
octet streams of type image/svg+xml, subsequently compressed
with gzip.
Macintosh Universal Type Identifier code:
org.w3c.svg conforms to public.image and to public.xml
Windows Clipboard Name:
"SVG Image"
Fragment Identifiers
For documents labeled as application/svg+xml, the fragment
identifier notation is that for application/xml, as specified
in RFC 3023 or its successors, plus the SVG-specific SVG Views
syntax described in the SVG specification.
Person& email address to contact for further information:
Chris Lilley, Doug Schepers (member-svg-media-type(_at_)w3(_dot_)org).
Intended usage:
COMMON
Restrictions on usage:
None
Author:
The SVG specification is a work product of the World Wide Web
Consortium's SVG Working Group.
Change controller:
The W3C has change control over this specification.
--
#-# Martin J. Dürst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp
mailto:duerst(_at_)it(_dot_)aoyama(_dot_)ac(_dot_)jp
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--
Chris Lilley Technical Director, Interaction Domain
W3C Graphics Activity Lead, Fonts Activity Lead
Co-Chair, W3C Hypertext CG
Member, CSS, WebFonts, SVG Working Groups
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