W3C home > Mailing lists > Public > www-rdf-interest@w3.org > January 2003

abouteach etc Re: Alertbox: Site map usability (fwd)

From: Charles McCathieNevile <charles@w3.org>
Date: Sat, 11 Jan 2003 06:36:19 -0500 (EST)
To: Phil Archer <phil.archer@icra.org>
cc: Gary Frederick <gary.frederick@jsoft.com>, <www-rdf-interest@w3.org>
Message-ID: <Pine.LNX.4.30.0301110628330.23180-100000@tux.w3.org>

First, let me note that this sort of thing seems to be of reasonably broad
interest, so please keep the discussion in an archived list for later

Another use case is the EARL vocabulary under development at the moment by
W3C's Evaluation and Repair Tools group, part of the Web Accessibility
Initiative domain.

The basic idea is very similar to PICS - being able to express conformance to
some requirements. It assumes that you will have a URI that describes a
particular set of requirements (these could be accessibility, suitability for
children, or anything else) and can point to that.

One of the aspects that hasn't been fully explored in the draft specification
available - http://www.w3.org/TR/EARL10 - is how to locate the things that
are the subject of the claim. Some work has been done for making claims about
a part of a page (for example a particular image is a problem, without saying
anything about the rest of the page).

An approach that has been mooted is to have RDF content that describes the
things the statement s about - whether an Xpointer, or a reference to a
web service that provides a pointer into something for which xpointer or URI
syntax does not give a formal definition (e.g. a range in non well-formed
pseudo-HTML). This could equally be RDF that discusses a regexp, although the
implications of this haven't been completely considered (they are tricky...)

more later - I am on a stopover and need to run again


Charles McCN

On Fri, 10 Jan 2003, Phil Archer wrote:

>We're only just getting going but the ideas in my mind are that an rdf:about
>element might be able to include wildcards and regular expressions.  Then
>use an HTML Link element in each page on a site (presumably through
>inclusion in a template) or in an HTTP response header, to point to the
>site's RDF information.  A parser then uses the first description it finds
>that matches the about string/regEx.  This is probably sheer heresy I know,
>but without some sort of route through which one description can be applied
>to multiple URIs, including those that don't exist at the time the
>description is written, RDF is a poor replacement for PICS (which has enough
>problems of its own!).
>Another idea I want to explore (which may be unworkable but I want to know
>it's unworkable before I give it up) is that, say, a film classification
>board could lodge an RDF description of its various categories.  Streaming
>media could then point to one of those limited number of classifications
>which in turn would recognise the pointer as valid (through some sort of
>DSig no doubt).  The descriptions would be cached just about everywhere
>before long.  Sounds a bit like CC/PP device profiles doesn't it?
>Banner ads cause no end of problems for PICS as well. The ability to write a
>label  that covered *doubleclick.[com|net] would be SO useful if only such a
>mechanism existed!
>I don't want to clog up everyone's inboxes with this needlessly.  If this
>kind of thing is  of interest to you/anyone, please let me know directly.
>Phil Archer
>Chief Technical Officer
>Internet Content Rating Association
>----- Original Message -----
>From: "Gary Frederick" <gary.frederick@jsoft.com>
>To: <www-rdf-interest@w3.org>
>Sent: Friday, January 10, 2003 8:16 PM
>Subject: Re: Alertbox: Site map usability (fwd)
>> danbri@w3.org wrote:
>> ...
>> > So Mozilla kinda does this for the currently viewed page, using HTML
>> > elements in the HEAD of a document. But it only has the current
>> > point of view, not access to the rest of the sitemap. Having it (and IE,
>> > Opera...) consume RDF sitemap for navigation support would be pretty
>> >
>> We are starting to add the link elements into some of our documentation.
>> It would be nice if IE and others in addition to Mozilla did something
>> with it.
>> > Has anyone spent any time looking at this? (I'd expect folk working on
>> Here is some drafty documentation
>>    http://www.jsoft.com/ts/tools/HTML/links/Chapter1.html
>> Turn on the Site Navigation Bar in a recent Mozilla
>>    View->Show/Hide->Site Navigation Bar
>> and click on the above url. The Top and Up don't have their link
>> elements hooked up. That is an exercise for our students.
>> Not site maps, but a step forward that may result in useful info.
>> We would like to have some simple tools where we can describe the
>> relationships in rdf and be able to generate the html link elements. It
>> would be even nicer if we could also get the relationships for a page
>> from the html link elements and have it feed back into rdf.
>> It should be 'easy' to get rdf out of xhtml with link elements and then
>> get link elements back out of the rdf. Any pointers to anyone's work on
>> translating link elements into rdf and back?
>> Gary

Charles McCathieNevile  http://www.w3.org/People/Charles  tel: +61 409 134 136
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Received on Saturday, 11 January 2003 06:36:44 UTC

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