[whatwg] Attribute for holding private data for scripting

Anne van Kesteren annevk at opera.com
Tue Apr 10 12:19:52 PDT 2007

On Tue, 10 Apr 2007 20:21:27 +0200, Sam Ruby <rubys at intertwingly.net>  
>> Or allow any attribute that starts with "x_" or something (to prevent
>> clashing with future revisions of HTML), as private attributes.
> Instead of "starts with x_", how about "contains a colon"?
> A conformance checker could ensure that there is a corresponding xmlns
> declaration that applies here, and possibly even do additional
> verification if it recognizes the namespace.
> An HTML5 parser would, of course, recover from references to
> undeclared namespaces, placing the entire attribute name (including
> the prefix and the colon) into the DOM in such situations.

* That would be confusing to people familiar with XML;
* It would hinder the ability to exchange scripts between HTML and XML;
* It would create more differences between XML and HTML where less seems
   to be desired (trailing slash allowed, etc.).

Anne van Kesteren

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