[Bug 21501] Advice to conformance checkers section

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21501

--- Comment #4 from Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no> ---
The lottery article also has the following to issues, which should be easy
checkable for the validator:

* [longdesc] points to the image itself (i.e. the same URL 
  as the src attribute)
* [longdesc] points to the page you're already on


A double question to you, Charles: 

(1) Are you _JUST_ opposed tohaving the validation advice I propose in the
spec, but have nothing against, and would actually prefer that the validator
*do* check several of the things I propose?

(2) OR are you _BOTH_ opposed to the validation advice _AND_ opposed to any
validation of the things I have proposed? (Needless to say, (1) would be easier
for me to understand than (2).)


THe Lottery article says that in 96% of the cases, the longdesc:

1. is blank
2. is not a valid URL
3. points to the image itself (i.e. the same URL as the src attribute)
4. points to the page you're already on
5. points to the root level of another domain
6. is the same as a parent link's href attribute (i.e. the longdesc is
redundant because you could just follow the image link instead)

Assuming that the Lottery article lists those things in order of frequency
(which seems likely to me), then the longdesc spec, as we know, covers
validation of 1st and 2nd issue above. But the 3rd and and 4th issue - I don't
see why we would need a Best Practice document before starting to give warnings
about those. I agree that with the 5th issue, we are wading into problems that
perhaps are harder to define than issue 3 and 4.

For the 6th issue, then I don’t know what validator should do, at the moment,
and the issue in this case is of another kind than the issues 1 to 5.

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Received on Wednesday, 3 April 2013 10:06:27 UTC