I have not seen any document that can make me sure that the given set of values, such as "description", "generator" and "keywords", is defined in the namespace of XHTML ("http://www.w3.org/1999/xhtml "). In other words, I would like editors to give, in this section, an example like this:

   <x:html xmlns:x="http://www.w3.org/1999/xhtml " xmlns="http://purl.org/dc/elements/1.1/ ">
     <x:head>
       <x:meta property="x:title">My Life and Times</x:meta>
       <x:meta about="http://www.example.com/ " property="created">2004-03-20</x:meta>

property attribute - 23.1. Metadata Attribute Collection:
<http://www.w3.org/TR/2005/WD-xhtml2-20050527/mod-metaAttributes.html#col_Metainformation >

The property attribute, whose type of value is QName, can be extended. And, "extensions must be defined in their own namespace, and the relationship names must be referenced in documents as qualified names (e.g., dc:creator for the Dublin Core "creator" relationship)."


Thank you,
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Ai
<http://orz.cc/ > (ja-JP;q=9, en-US;q=1)