Internal subset equivalent in new schema proposals?

John Cowan cowan at
Sat Nov 28 05:25:38 GMT 1998

Paul Prescod scripsit:

> In fact, I'll go so far as to say that it does NOT make sense. SGML goes
> *too far* in this direction: the ID/IDREF mechanism should be treated at a
> separate level, like other integrity constraints.

IMHO the purpose of ID/IDREF is to express non-hierarchical data using
hierarchical notation.  Appropriate use of ID and IDREF attributes
allows the representation of any directed graph, whether acyclic or

John Cowan					cowan at
		e'osai ko sarji la lojban.

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