Re: entities in XML/XSL

[Chris Maden <crism@xxxxxxxxxxx>]

[Westerberg, Rolf]
> I don't know of any pre-defined entities in XML/XSL. Could you
> please tell me where they are defined ?

They're defined in the XML specification: &, ', >, <,
".

> Could I not have a SGML/XML catalog or entity file refered to with
> environment varaiable or an option to the application ?  The same
> way as the SGML_CATALOG_FILES environment varaiable to sp.

You can have a catalog if you want; that's outside of the scope of XML
per se.

But any entity you want to use (other than the five pre-defined ones)
must be declared within the document, and all external entity
declarations must have system identifiers.  They can have public
identifiers *in addition*, and a processor may use the public
identifier instead of the system identifier, but you must still give a
system identifier.

-Chris
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