[jQuery] Attribute selector with namespace

[jQuery] Attribute selector with namespace

Is there a way to specify an AttributeFilter for attributes within a certain namespace? I try some alternatives but it seems that is not implemented.
For example:
<span x:foo="bar">Lorem</span>
I would need that something like $('[x:foo]') find the span element.
Thanks.<br clear="all">Brian J. Cardiff
bcardiff(?)<a href="http://gmail.com">gmail.com</a>
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