Hi, This is a QA Review comment for "XHTML 2.0" http://www.w3.org/TR/2006/WD-xhtml2-20060726/ 2006-07-26 8th WD
About http://www.w3.org/TR/2006/WD-xhtml2-20060726/mod-roleAttribute.html#s_roleAttributemodule There will be confusion in the community about the exact usage of role, property and class which seem to cover very similar goal. Reading the specification, a few times it's still not clear what are the abstract definition of each of them role = QNames This attribute describes the role(s) the current element plays in the context of the document. It is used by applications and assistive technologies to determine the purpose of UI widgets. property = QName This attribute indicates which property is being defined by the element. If it is not specified, the property is reference. class = NMTOKENS This attribute assigns one or more class names to an element; the element may be said to belong to these classes. A class name may be shared by several element instances. rel = QName This attribute describes the relationship between the resource specified by the about attribute (or its default value) and the resource referred to by the href attribute. The way it is said in the specification, it leads to believe that role is for widgets/behaviour property is for semantics class is for style? rel/rev is for relationship between documents. Many attributes with definition which seems to be overlapping sometimes. But it makes it a little bit awkward to have property and class. class is already use for semantics in the microformats community and in many cases outside of this community. Why not giving the definition of property to the class attributes, will it create specific problems? In the wiki page http://microformats.org/wiki/hcalendar-example1-steps assume that "class <=> property" <p class="vevent" href="http://www.web2con.com/";> <span class="summary">Web 2.0 Conference</span>: <span class="dtstart" content="2005-10-05">October 5</span>- <span class="dtend" content="2005-10-08">7</span>, at the <span class="location">Argent Hotel, San Francisco, CA</span> </p> The content attribute here solves an abuse by the microformat community which puts accessibility users at risk. -- Karl Dubost - http://www.w3.org/People/karl/ W3C Conformance Manager, QA Activity Lead QA Weblog - http://www.w3.org/QA/ *** Be Strict To Be Cool ***
