Re: [svg-developers] Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Doug,

well it's certainly exciting news that you intend to contribute.

in the meantime it is possible to write documents that work in both asv 
and mozSVG.
including one that demonstrates  tool tips! which may mean using 
scripting in this instance.

A large part of accessibility is ensuring that documents degrade 
gracefully, or where possible function on a range of equipment which 
may not meet the latest specification.

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 4 Dec 2004, at 22:10, Doug Schepers wrote:

Jonathan-

Of course it won't work in Mozilla's SVG implementation. As good as 
MozSVG
is on what it does, it is not nearly a complete implementation of even 
SVG
1.0 (nor does it claim to be, though it's making good progress). I don't
think that it's useful to point out every example posted to this list 
that
won't work in MozSVG, since that would be the vast majority of examples.

This example is standard SVG; however, it will only work in a UA that 
has
support for both SMIL animation and the 'tref' element. MozSVG has 
neither.
In fact, AFAIK, it doesn't even support the 'title' and 'desc' elements.

As you know, I'm looking into adding support for SMIL animation to 
MozSVG,
and as my schedule permits, I will begin actually adding elements. 
However,
getting started on it is not trivially easy. It is not a matter of 
biting
the bullet, but a serious commitment of time and resources.

If I were you, I would not look forward to this example working in 
MozSVG
for six months at the earliest, and probably longer.

However, it is a pragmatic solution for ASV, which is what most people 
use.

-Doug

Jonathan Chetwynd wrote:
|
| Schepers,
|
| that's an elegant solution, however one that may not be
| supported by the MozSVG implementation.
| #273171 could be one to bite the bullet on?
|
| regards
|
| Jonathan Chetwynd
|http://www.peepo.co.uk; It's easy to use
| irc://freenode/accessibility
| On 4 Dec 2004, at 20:01, Doug Schepers wrote:
|
| As promised, here is the sample I cooked up to demonstrate referencing
| metadata elements:
|
|http://svg-whiz.com/samples.html#trefMetadata
|
| Regards-
| Doug
|



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Re: [svg-developers] Re: Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Jim,

that's preposterous, in terms of accessibility the SVG1.1 spec is 
broken. The chair and others have indicated that there is much work to 
be done. for instance ASV3.1 doesn't support standard keyboard 
accessibility any more than mozSVG, or any other UA afaik.

Following standards only improves accessibility, if the standards were 
designed appropriately in the first place, and the UA also implements 
them appropriately. Significantly it may also be necessary for 
peripheral i/o devices to also be upgraded to meet these standards.

In no case does the number of user agents have anything to do with the 
matter.
It may well be that mozSVG is the first and only UA to support keyboard 
navigation, in which case user will be obliged to use it if they 
require keyboard navigation, certainly ASV3 will not be useful. In that 
case scripting solutions maybe a requirement, until such time as the 
next pre-beta is released by Adobe. They may well be a minority, but 
serving minorities is the meaning of accessibility.

Your contribution to the mozSVG accessibility bug team is awaited.

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 5 Dec 2004, at 12:36, Jim Ley wrote:


  Jonathan Chetwynd [EMAIL PROTECTED] wrote in message
  news:[EMAIL PROTECTED]

  in the meantime it is possible to write documents that work in both 
asv
  and mozSVG.
  including one that demonstrates tool tips! which may mean using
  scripting in this instance.
  
  A large part of accessibility is ensuring that documents degrade
  gracefully, or where possible function on a range of equipment which
  may not meet the latest specification.

  But one of the things not to do is to introduce a whole load of 
authoring
  and accessibility problems to support a pre-beta product, pages we 
author
  today do not have a lifetime of the few weeks that a pre-beta product 
like
  MozillaSVG does. A SMIL approach works in a number of shipping user 
agents,
  accessibility is not a whole heap of author focussed hacks to make it 
work
  in all user agents (especially when Doug's works in more user agents 
than
  your scripting one)

  Tooltips can't be required functionality of your page, simply because
  they're not supported by all viewers (the spec only supports them if 
either
  the optional script, or optional SMIL is supported) because of this 
your
  page must degrade in the absence of tooltips, so not having a reliance 
on
  script, and supporting non scripting user agents like ikivo or zoomon 
SVG
  tiny players is a very good thing.

  Jim.





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[svg-developers] Re: Re: Re: tool tips --on mouse over

2004-12-05 Thread Jim Ley

that's preposterous, in terms of accessibility the SVG1.1 spec is
broken.

Certainly, but you keep bringing back specific discussions, about specific 
things, to the general SVG accessibility as a whole is broken.  We were 
specifically discussing tooltips, nothing more.

In no case does the number of user agents have anything to do with the
matter.

Of course it does, writing a whole load of crap javascript does not improve 
accessibility, never, rather than taking what I write to be about the thing 
I'm writing about - tooltips - you decide to extend what I write to 
everywhere

 They may well be a minority, but
serving minorities is the meaning of accessibility.

No it's not!  accessibility is not about authors increasing their authoring 
costs hundreds of percent simply to work around bugs in user agents and 
specification, if you have a particular desire to support certain user 
agents, then it's down to you when you do it, however to criticise Dougs 
example because it didn't work in Mozilla SVG was extremely misleading when 
your example didn't work in Ikivo, Bitflash (and maybe even tinyline) 
whereas Dougs did.  They're released shipping players used by thousands of 
people, Mozilla SVG certainly is not that.  Supporting mozilla SVG can well 
be worthwhile but not at the expense of other user agents, and certainly 
don't expect others to go out of there way to work around its 
bugs/limitations, as it's pre-beta product, and those limitations and bugs 
will soon be fixed.

The SMIL solution for tooltips is a very good one, much better than the 
script one, for a large number of reasons.

Your contribution to the mozSVG accessibility bug team is awaited.

I do not use mozilla, so I won't be finding bugs in it, I find the interface 
annoying as a browser, I'm doing what I can to aid the project though as you 
well know.

Jim. 





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RE: [svg-developers] Re: tool tips --on mouse over

2004-12-05 Thread Doug Schepers

As promised, here is the sample I cooked up to demonstrate referencing
metadata elements:

http://svg-whiz.com/samples.html#trefMetadata

Regards-
Doug

doug . schepers  @ vectoreal.com
www.vectoreal.com ...for scalable solutions.
 

Doug Schepers wrote:
| 
| Hi, Ravi-
| 
| That's because 'title', 'desc', 'metadata', and the proposed 
| 'hint' (among many other elements, such as 'g') are 
| non-rendering elements. In this case, they are all used for 
| semantically-tagged metadata. Of these, only 'hint' is at all 
| rendered, triggered by a mouseover, but that's SVG1.2 
| functionality... Not here yet.
| 
| You can get the contents of 'title' and 'desc' to render by 
| using them as referents to a 'tref'. I'll post an example to 
| my Web site later today.
| 
| Regards-
| Doug
| 
| doug . schepers  @ vectoreal.com
| www.vectoreal.com ...for scalable solutions.
|  
| 
| dandiya wrote:
| | 
| | Hi Doug
| | In the example you posted
| | http://svg-whiz.com/samples.html#insertShapes
| | 
| | how come the title and desc are not visible along with the 
| shapes even 
| | though you have generated both and appended them.
| | Are title/desc triggered only on a particular event?
| | 
| | 
| | -Ravi
|



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Re: [svg-developers] Re: Re: Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Jim  Schepers,

the SMIL tooltips example code uses mouseover and mouseout, almost by 
definition that can't be good accessibility because it is device 
dependent. please see hixie's bug #273197 where mozSVG may be 
supporting tab.
assuming users can tab to these graphics, which is by no means clear, 
as they are not links... they will not currently see the tooltips. for 
asv3, this wont be a concern, as they also can't tab :-)

It would be very much easier if authoring tools arranged these matters 
for us, in the meantime... we are obliged to consider how they might.

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 5 Dec 2004, at 16:43, Jim Ley wrote:

 that's preposterous, in terms of accessibility the SVG1.1 spec is
  broken.

  Certainly, but you keep bringing back specific discussions, about 
specific
  things, to the general SVG accessibility as a whole is broken. We were
  specifically discussing tooltips, nothing more.

  In no case does the number of user agents have anything to do with the
  matter.

  Of course it does, writing a whole load of crap javascript does not 
improve
  accessibility, never, rather than taking what I write to be about the 
thing
  I'm writing about - tooltips - you decide to extend what I write to
  everywhere

   They may well be a minority, but
  serving minorities is the meaning of accessibility.

  No it's not! accessibility is not about authors increasing their 
authoring
  costs hundreds of percent simply to work around bugs in user agents and
  specification, if you have a particular desire to support certain user
  agents, then it's down to you when you do it, however to criticise 
Dougs
  example because it didn't work in Mozilla SVG was extremely misleading 
when
  your example didn't work in Ikivo, Bitflash (and maybe even tinyline)
  whereas Dougs did. They're released shipping players used by 
thousands of
  people, Mozilla SVG certainly is not that. Supporting mozilla SVG can 
well
  be worthwhile but not at the expense of other user agents, and 
certainly
  don't expect others to go out of there way to work around its
  bugs/limitations, as it's pre-beta product, and those limitations and 
bugs
  will soon be fixed.

  The SMIL solution for tooltips is a very good one, much better than the
  script one, for a large number of reasons.

  Your contribution to the mozSVG accessibility bug team is awaited.

  I do not use mozilla, so I won't be finding bugs in it, I find the 
interface
  annoying as a browser, I'm doing what I can to aid the project though 
as you
  well know.

  Jim.





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Re: [svg-developers] Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Jim,

perhaps you can enlighten me, what is the 'required information' that a 
blind user or a user who prefers not to use a mouse will get from this 
SMIL document?

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 5 Dec 2004, at 18:22, Jim Ley wrote:


  Jonathan Chetwynd [EMAIL PROTECTED] wrote in message
  news:[EMAIL PROTECTED]

  the SMIL tooltips example code uses mouseover and mouseout, almost by
  definition that can't be good accessibility because it is device
  dependent.

  No, there's nothing inaccessible about having additional functionality
  provided to users of the mouse, it's not required information.

  Jim.










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RE: [svg-developers] Re: tool tips --on mouse over

2004-12-05 Thread Doug Schepers

Hi, Jonathan-

Jonathan Chetwynd wrote:
|
| in the meantime it is possible to write documents that work 
| in both asv and mozSVG.
| including one that demonstrates  tool tips! which may mean 
| using scripting in this instance.

Er... You mean like the scripted tooltip example on the same page, which is
referenced and co-linked by the SMIL example?


| A large part of accessibility is ensuring that documents 
| degrade gracefully, or where possible function on a range of 
| equipment which may not meet the latest specification.

I'm sorry, but as Jim has noted elsewhere, I am not going to shoot at a
moving target, nor will I recommend that anyone else does. Programming to
fit one or more profiles is a Good Thing, but being bugwards-compatible is
neither interesting nor useful.

If an implementation is broken or incomplete, that's the fault of the
implementation. If good code that should work in that implementation,
doesn't work, that's impetus to the implementors (not the authors) to fix
what's broken. I don't want to make documents that encourage laxity of
implementations. I seriously doubt that any of the MozSVG dev gurus would
suggest that I dumb down my code. MozSVG will get there in time, but it's
not there yet.

Regards-
Doug

doug . schepers  @ vectoreal.com
www.vectoreal.com ...for scalable solutions.
 



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Re: [svg-developers] Re: Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Jim and Schepers,

well I agree it is possible, and even likely that future UA will 
provide at least an option to view metadata such as title and desc in a 
specific area of the screen such as perhaps the status bar. However in 
that case Doug's example is redundant.

If you read the bug report which I drew your attention to it mentions 
UAG:
http://www.w3.org/TR/UAAG10/guidelines.html#gl-device-independence

specifically the first guideline makes it clear, that if you choose to 
render a tooltip this should be device independent.
It could not be much clearer. You do not have to render a tooltip, but 
if you do

Ensure that the user can interact with the user agent (and the content 
it renders) through different input and output devices. content 
appears in this instance to be defined as The text between the 
start-tag and end-tag is called the element's content. This is clearly 
an example of rendered text.

The script example on the same page, is also mouse dependent, so not 
effective in this instance.

In order to check the usefulness of tooltips it is necessary to provide 
them for tab users. This has been drawn to my attention on numerous 
occasions during seminars when the audience has raised this issue.

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 5 Dec 2004, at 19:37, Jim Ley wrote:


  Jonathan Chetwynd [EMAIL PROTECTED] wrote in message
  news:[EMAIL PROTECTED]
  perhaps you can enlighten me, what is the 'required information' that 
a
  blind user or a user who prefers not to use a mouse will get from this
  SMIL document?

  Whatever their access technology provides by way of access to the 
metadata,
  the whole point of Dougs example was that he re-used the metadata from 
the
  document via SMIL into an additional display of the data for those 
user who
  can make use of it. It's additional. The tooltips simply cannot be 
giving
  required information, that would inaccessible.

  Visual semantic languages can only provide metadata to allow access by 
the
  blind, it's simply not possible for visual semantics to be 
understandable in
  other ways (well an AT could attempt to say there's a circle/path etc. 
but
  to construct that to something useful is impossible IMO for all 
non-trivial
  graphics)

  Jim.





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[svg-developers] Re: Re: Re: tool tips --on mouse over

2004-12-05 Thread Jim Ley


Jonathan Chetwynd [EMAIL PROTECTED] wrote in message 
news:[EMAIL PROTECTED]

If you read the bug report which I drew your attention to it mentions
UAG:
http://www.w3.org/TR/UAAG10/guidelines.html#gl-device-independence

specifically the first guideline makes it clear, that if you choose to
render a tooltip this should be device independent.
It could not be much clearer. You do not have to render a tooltip, but
if you do

Doug is an author, he doesn't have any reason to follow the _User Agent_ 
authoring guidelines, authors are free to do whatever they like, giving 
extra functionality to any users they like, there's nothing inaccessible 
about it.

Jim. 





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[svg-developers] SVG discussion on slashdot

2004-12-05 Thread Mike Kidson


URL for Slashdot article:
http://tinyurl.com/658z9


Weather Data Available in XML 

 Posted by michael on Sunday December 05, @06:21PM
from the stormy-weather dept.
wombatmobile writes Wired reports the National Oceanic and 
Atmospheric Administration this week began providing weather 
data in an open access XML format. Previously, the data was 
technically available to the public, but in a format that's not easily 
deciphered. How will the free and easy availability of valuable data 
like this in XML affect the development of the web? One example is 
Tom Groves SVG weather. This type of visualization of XML data is 
about to fall within easy reach with nothing more than a text editor 
required as an authoring tool. From March 2005 SVG becomes 
part of the standard Mozilla/FireFox build. As an example of how 
web standards are supposed to work, what more could you hope to 
find? We mentioned the policy change a few days ago. 

Mike


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Re: [svg-developers] Re: Re: Re: tool tips --on mouse over

2004-12-05 Thread Jonathan Chetwynd

Jim,

I refer you to WCAG 1.0 and WCAG 2.0

http://www.w3.org/TR/WCAG20/#keyboard-operation
  Guideline 2.1 Make all functionality operable via a keyboard or a 
keyboard interface.

http://www.w3.org/TR/WCAG10/#gl-device-independence ?
9.2 Ensure that any element that has its own interface can be operated 
in a device-independent manner. [Priority 2]
 Refer to the definition of device independence.
 Refer also to guideline 8.
 Techniques for checkpoint 9.2
9.3 For scripts, specify logical event handlers rather than 
device-dependent event handlers. [Priority 2]
 Techniques for checkpoint 9.3
(whilst Doug's code uses declarative animation rather than script these 
checkpoints would be relevant.)

If you believe that W3 has published accessibility guidelines that 
support your position, please point to them.

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 5 Dec 2004, at 20:36, Jim Ley wrote:


  Jonathan Chetwynd [EMAIL PROTECTED] wrote in message
  news:[EMAIL PROTECTED]

  If you read the bug report which I drew your attention to it mentions
  UAG:
  http://www.w3.org/TR/UAAG10/guidelines.html#gl-device-independence
  
  specifically the first guideline makes it clear, that if you choose to
  render a tooltip this should be device independent.
  It could not be much clearer. You do not have to render a tooltip, but
  if you do

  Doug is an author, he doesn't have any reason to follow the _User 
Agent_
  authoring guidelines, authors are free to do whatever they like, giving
  extra functionality to any users they like, there's nothing 
inaccessible
  about it.

  Jim.





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Re: [svg-developers] SVG discussion on slashdot

2004-12-05 Thread Jonathan Chetwynd

Mike,

thanks for pointing this up, if anyone is considering making a realtime 
SVG application:
http://www.nws.noaa.gov/forecasts/xml/SOAP_server/ndfdXML.htm
it uses .jpg for the weather icons, SVG ones might be available, just 
ask :-)

It's a great pity this is continental USA only, UKmet office is hoping 
to make money out of any proposed SVG service

regards

Jonathan Chetwynd
http://www.peepo.co.uk It's easy to use
irc://freenode/accessibility
On 6 Dec 2004, at 02:44, Mike Kidson wrote:


  URL for Slashdot article:
http://tinyurl.com/658z9


  Weather Data Available in XML

  Posted by michael on Sunday December 05, @06:21PM
  from the stormy-weather dept.
  wombatmobile writes Wired reports the National Oceanic and
  Atmospheric Administration this week began providing weather
  data in an open access XML format. Previously, the data was
  technically available to the public, but in a format that's not easily
  deciphered. How will the free and easy availability of valuable data
  like this in XML affect the development of the web? One example is
  Tom Groves SVG weather. This type of visualization of XML data is
  about to fall within easy reach with nothing more than a text editor
  required as an authoring tool. From March 2005 SVG becomes
  part of the standard Mozilla/FireFox build. As an example of how
  web standards are supposed to work, what more could you hope to
  find? We mentioned the policy change a few days ago.

  Mike


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