Chris Lilley wrote:
MURATA Makoto wrote:
Q1. If you introduce a media type "image/svg", you can certainly introduce
SVG-specific fragment
identifiers.
There are two issues here.
Firstly, since it is defining a media type, it needs to define what the
fragment identifier syntax is. We use XPointer, but in this release
restict it to pointing to IDs. This is because we want a spec that is
fully implemented very rapidly.
Later versions will probably remove this restriction, once XLink and
XPointer are more established.
16.2.2 "SVG fragment identifiers" of the latest draft of SVG [1] introduces
SVG view specifications such as
"MyDrawing.svg#svgView(viewBox(0,200,1000,1000)))".
16.2.2. SVG fragment identifiers
Shorthand bare name form of addressing (e.g.,
MyDrawing.svg#MyView). This form of addressing, which
allows addressing an SVG element by its ID, is compatible
with the fragment addressing mechanism for older versions of
HTML and the shorthand bare name formulation in "XML Pointer
Language (XPointer)" [XPTR]. (The bare name form of addressing
#MyElement is equivalent to the XPointer formulation
#xptr(id('MyView')).)
XPointer-compatible ID reference (e.g.,
MyDrawing.svg#xptr(id('MyView'))). This form of addressing,
which also allows addressing an SVG element by its ID, is
compatible with the syntax for referencing IDs in "XML Pointer
Language (XPointer)" [XPTR].
SVG view specification (e.g.,
MyDrawing.svg#svgView(viewBox(0,200,1000,1000))). This form of
addressing specifies the desired view of the document (e.g.,
the region of the document to view, the initial zoom level)
completely within the SVG fragment specification. The contents
of the SVG view specification are the five parameter specifications,
viewBox(...), preserveAspectRatio(...), transform(...),
allowZoomAndPan(...) and viewTarget(...), whose parameters have
the same meaning as the corresponding attributes on a <view> element.
Chris Lilley wrote:
I would like to understand what you mean by "SVG fragment identifier"
before being able to answer how I feel. I need to understand your
question better first.
Let me reformulate my question. Suppose that I have an XHTML document.
The first subsection of the second section has an embedded SVG.
I would like to use an XPointer to specify "the SVG in the first subsection
of the second section". Then, I would like to obtain a region of this SVG
by using an SVG view specficiation such as svgView(viewBox(0,200,1000,1000))).
I would like to combine the XPointer and the SVG view specfication to form a
fragment identifier. I think I cannot do this, since SVG view speficiations
require image/svg and XPointer requires text/xml or application/xml (or
*/*-xml).
Am I right?
#Probably, I am repeating the debate Gavin did long time ago.
[1] http://www.w3.org/TR/SVG/linking.html#LinksIntoSVG
Makoto
Fuji Xerox Information Systems
Tel: +81-44-812-7230 Fax: +81-44-812-7231
E-mail: murata(_dot_)makoto(_at_)fujixerox(_dot_)co(_dot_)jp