Re: XML external entity references
> Is it correct, that this is not a legal XML file (since an external > entity &message; well &message; isn't defined so you can't tell if it is internal (defined by <!ENTITY message "hello"> ) or external, defined by <!ENTITY message SYSTEM "foo.xml"> > These productions imply that doctypedecl is optional. yes but that is so that <x>foo</x> is well formed without a doctypedecl. You need it if you need it. > Can somebody please point to the > relevant section of the XML spec, where the above XML proves to be > illegal. http://www.w3.org/TR/xml/#wf-entdeclared ... the Name given in the entity reference MUST match that in an entity declaration that ... > Can I anyhow successfully parse the above XML? for e.g., using a > custom entity resolver, or using a catalog file. you can use a catalog file that defaults in a dtd that defines the entity. Actually if you swap in _any_ external DTD and use a non validating parser you may (depending on configuration, but not for example in xpath) be able to parse past the syntax as an undefined entity ref. because of the paragraph following the one quoted above which says Note that non-validating processors are not obligated to read and process entity declarations occurring in parameter entities or in the external subset; for such documents, the rule that an entity must be declared is a well-formedness constraint only if standalone='yes'. David ________________________________________________________________________ The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. ________________________________________________________________________
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