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At 2005-04-12 02:31 -0500, Jack Matheson wrote:
>In section 4.4 of the XML specification, a distinction is made between
>entities referenced in attribute values
>and entities occurring as attribute values.
<!NOTATION gif SYSTEM "">
<!ENTITY foo SYSTEM "../../images/foo.gif" NDATA gif>
>Can anyone explain this difference to me?
I hope the above distinction helps. Unparsed entities can only be
referenced as attribute values ... since they aren't parsed, they cannot be
referenced as a parsed entity as in &foo;.
An unparsed entity's relative URI is resolved to an absolute URI based on
the location of the entity declaration in either the internal or an
external declaration subset. In XSLT using unparsed-entity-uri() will get
you the absolute URI. This is very helpful in publishing when managing the
locations of graphic files being referenced for XSL-FO engines.
I don't see many of my students having used unparsed entities, though, when
I cover this topic in class.
I hope this helps.
World-wide on-site corporate, govt. & user group XML/XSL training.
G. Ken Holman mailto:gkholman@CraneSoftwrights.com
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