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   Re: [xml-dev] Character Entities: An XML Core WG View

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From: "Micah Dubinko" <MDubinko@cardiff.com>
> Question: why is this currently a WF error, as opposed to a validity error?
> Are there any known cases of processing that *depends* on this being
> a WF error (and would thus be surprised if it someday became allowed)?

An unresolved entity reference says the physical structure of the document is 
incomplete, just as much as if a start-tag were missing.  There is certainly a level 
below WF that is useful, for manipulating text+markup rather than infosets,

That is the difference between an entity referenced for inclusion (i.e. using
&xxx;) and an entity referenced just as a link (i.e. using ENTITY attributes,
xlink:href, etc).   An entity reference for inclusion is a non-optional part of
a document: it is a basic integrity mechanism.   

Rick Jelliffe


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