Hmm, on the one hand this proposal makes XML come full-circle and re-introduce SGML concepts (eg. SHORTREF) that were explicitly omitted from XML as a simplifie

Hmm, on the one hand this proposal makes XML come full-circle and re-introduce SGML concepts (eg. SHORTREF) that were explicitly omitted from XML as a simplified SGML subset for canonical angle-bracket markup without the need for markup declarations; OTOH, Norm and Steve are fully aware of SGML. I'd really appreciate if whoever wants to re-introduce SGML features to XML would justify and align their proposal with SGML, just as XML has been introduced as a proper, well-aligned subset of SGML.