Bug: fragref does not allow keyref

[Eliot Kimber <ekimber@reallysi.com>]

The fragref element is a specialization of topic/xref. As currently declared
it does not allow @keyref, only @href. I can't think of any reason it
shouldn't also allow @keyref. This looks like a bug to me.

Cheers,

E.
-- 
Eliot Kimber
Senior Solutions Architect
"Bringing Strategy, Content, and Technology Together"
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