W3C home > Mailing lists > Public > www-tag@w3.org > September 2002

Re: suggested replacement text "circle or spline"

From: Dan Connolly <connolly@w3.org>
Date: 03 Sep 2002 22:43:20 -0500
To: Chris Lilley <chris@w3.org>
Cc: www-tag@w3.org
Message-Id: <1031111001.10114.28.camel@dirk>

On Fri, 2002-08-30 at 15:13, Chris Lilley wrote:
[...]
>   The presentational effects of following a link containing a fragment
>   identifier should be clearly separated, in discussions and in
>   specifications, into these two steps - the link into a portion of
>   the resource, and the effect on the presentation (if any) that this
>   produces.

Why?

An absolute URI reference is a referring
expression... a noun phrase. "a view of my house from the
south" identfies something different from "a view of my house
from the north". Yes, the same house is mentioned in both expressions;
but that doesn't mean the expressions identify the
same thing.


>   <replacement>
[...]
>   If the representation is an SVG graphic, the fragment identifier
>   either identifies an element in the content by its ID, or identifies
>   the whole document and passes a view specification. [SVGfrag] The
>   defined effect on a visual presentation of traversing a URI
>   reference containing such a fragment identifier is to pan and
>   possibly zoom the canvas at the so that, if an element is
>   identified, the rendering of the identified element is completely
>   contained in the current viewport; if a view specification is given,
>   the specified view is contained in the viewport.
> 
>   In the Resource Description Framework [RDF10frag], fragments do not
>   identify parts of the content but instead can be used to identify
>   the definition of anything, be it abstract (e.g., a dream) or
>   concrete (e.g., an automobile).

Hmm... I don't see any fundamental difference between
an SVG graphic focussed on the point (10, 20)
and an RDF description focussed on a dream
or an automobile.

It seems to me that
  MyDrawing.svg#svgView(viewBox(0,200,1000,1000)))
identifies a view of a drawing. The spec says so itself:
"This form of addressing specifies the desired view of the document"


>   </replacement>
> 
>   The additional references being
> 
>   [HTML4frag]
>    http://www.w3.org/TR/html4/struct/links.html#h-12.2.3
>   
>   [WebCGMfrag]
>   http://www.w3.org/TR/REC-WebCGM/REC-03-CGM-IC.html#webcgm_3_1_1
> 
>   [SVGfrag]
>   http://www.w3.org/TR/SVG/linking.html#LinksIntoSVG
[...]

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Tuesday, 3 September 2002 23:43:02 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 26 April 2012 12:47:11 GMT