A nice propeller head XML question :-)

Tim Bray tbray at textuality.com
Sat Sep 12 07:46:09 BST 1998


At 07:56 PM 9/11/98 -0400, Dean Roddey wrote:
>
>If the expansion of an entity reference is required to have a space on either
>side of the expanded text, correct? If so, then something like this must be
>invalid?
>
><!ENTITY % Foo 'ENTITY'>
><!%Foo; Bar 'Baz'>
>
>right?

Right.

> Because the expansion of Foo requires that spaces be placed on either
>side, creating this:
>
><! ENTITY Bar 'Baz'>

Right. 

>and the production for a PE declaration is:
>
>PEDecl ::=  '<!ENTITY' S '%' S Name S PEDef S? '>'
>
>which does not allow any space between the ! and ENTITY.

Right.

>Is this correct? Basically what I'm looking for here is a more general rule
>which says that I can consider any %blah; occurance at some place in the
>grammar that does not allow spaces at that point to be in error without even
>checking any further?

Seems to me you got it right based on the spec.   -Tim

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