[Bug 21501] New: Advice to conformance checkers section

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

            Bug ID: 21501
           Summary: Advice to conformance checkers section
    Classification: Unclassified
           Product: HTML WG
           Version: unspecified
          Hardware: PC
               URL: http://www.w3.org/TR/2013/WD-html-longdesc-20130312/#l
                    ongdesc
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML Image Description Extension
          Assignee: chaals@yandex-team.ru
          Reporter: xn--mlform-iua@xn--mlform-iua.no
        QA Contact: public-html-bugzilla@w3.org
                CC: public-html-admin@w3.org,
                    xn--mlform-iua@xn--mlform-iua.no

Suggest adding a section about advice to conformance checkers.

JUSTIFICTION: The spec would gain a lot of credibility if it would contain good
recommendations to conformance checkes so that as many as possible of the
errors created of the past would be catched via conformance checks.

Already, the spec allows conformance checkers verifh that the URL is valid and
(soon) that it is non-empty - this is an huge improvement. But is it possible
to get conformance checkers to do more than that?

Of course, as long as the URL is valid and non-empty, one cannot really issue
error messages. But it ought to be possible to issue certain warnings.

SUGGESTED ADVICE to give in that section:

* Recommend to warn if the longdesc URL does not contain a
  #fragment URI *and* points to a  top level site.
  (Thus, a double criterion for this warning.)
  Justification:  Longdesc URLs that e.g. points to top level
  domains have been pointed out as an issue.
* Recommend to warn if file suffix of the longdesc URI is
  identical with the file suffix of the @src attribute resoure
  (Justifiation: This hints that the longdesc URI points to 
   another image rather than to a description.)
* Recommend to run link checks - checks for rotten/broken links
  (404 messages etc)

More/Fewer things?

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Received on Tuesday, 2 April 2013 00:42:33 UTC