Hi QA, I tried the Unicorn validation service and encountered a problem: There appears an error message shall be written as See HTML Compatibility Guideline 7: The lang and xml:lang Attributes whenever you use a lang attribute in XHTML without also having an xml:lang attribute. My reading of the referenced HTML Compatibility Guideline C.7 from the XHTML 1 spec is that, for compatibility with HTML user agents, you should not use only an xml:lang attribute, which an HTML user agent will not understand, but add a lang attribute. The HTML Compatibility Guidelines do not address compatibility with generic XML user agents, which could be expected to understand xml:lang, but not XHTML's lang attribute. Requiring an xml:lang attribute does not enhance compatibility with HTML user agents. So the error message should only appear, if there is only an xml:lang attribute without an accompanying lang attribute in XHTML. Greetings -- Johannes Koch Fraunhofer Institute for Applied Information Technology FIT Web Compliance Center Schloss Birlinghoven, D-53757 Sankt Augustin, Germany Phone: +49-2241-142628 Fax: +49-2241-142065Received on Wednesday, 21 October 2009 08:46:00 UTC
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