external dtd subset content

[Tim Bray]

At 12:34 PM 12/12/97 +0100, james anderson wrote:
>2? among the example DTD's we've found, some begin with an <?xml ... >
>form. others don't. isn't that form excluded from being a PI and thus
>from being a markupdecl?

I just got around to checking the spec, and it's pretty clear.  Section 4.3.2
makes it clear that an external PE can begin with an <?xml text declaration;
I can't imagine that we'd allow that and forbid it in the external
subset but I can't see where we allow it explicitly ... so I suspect that 
we're going to have to fix production 31 before we are finished.  Thanks 
to Mr. Anderson for this. -Tim

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