XSchema Spec Section 2.2, Draft 1

[Paul Prescod]

On Thu, 25 Jun 1998, John Cowan wrote:
> Paul Prescod wrote:
> 
> Treating #PCDATA as an element is problematic because it doesn't have
> delimiters.  Consider models like ((#PCDATA, A) | (#PCDATA, B))
> or (#PCDATA, #PCDATA).

That's no worse than (A|A) and (A*,A). I've not heard any reason to worry 
about ambiguous content models in general. SGML had such a constraint on 
elements but I haven't heard a good defence of the constraint, especially 
in light of the removal of tag minimization.

http://www.sil.org/sgml/topics.html#ambiguity

 Paul Prescod


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