[relaxng-user] Inheritance rant.

[David.Pawson at rnib.org.uk]

XML supports inheritance in namespaces.
XML supports inheritance in the use of xml:lang

It doesn't support inheritance in ... say,
elements, or attributes.

Use case.

rss has the idea of a feed root, with n entries.

feed
  entry
  entry
  entry

The atom spec calls for an author element.
 if defined as a child of feed, it remains in force until
  overriden by providing an author child of entry, i.e. inherited.
 if not defined in feed,
   it must be provided by each entry child.
 Seems a bit of a waste.
  I couldn't figure out how to validate it in relax ng,
   hence had to step out to Schematron.

Is it reasonable to identify (somehow)
that element X is 'inheritable'?

Or that attribute Y is inheritable,
  until overriden.

</rant>
Regards DaveP.

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