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It is a little confusing, but the official XML DTD spec IS the XML spec:


Sorry, <!ELEMENT Tag (Foo & Bar)> is legal in SGML but not XML. Using & in
this SGML context means both Foo and Bar must be present in Tag, but they
can be in any order.


-----Original Message-----
From: SNedunuri@pav.com [mailto:SNedunuri@pav.com]
Sent: Thursday, February 15, 2001 9:17 AM
To: xml-dev@lists.xml.org
Subject: RE: HREFs in XSL

Does anyone know where the official specification of a DTD can be found?
I've done a search at w3.org and at oasis and have turned up nothing. In
particular, I read somewhere that rule for !Element permits the & character
between element names to indicate that the elements may occur in any order
eg. <!Element Tag (Foo, Bar)> requires Bar to follow Foo
OTOH <!Element Tag (Foo & Bar)> would permit Foo and Bar to be in any order

But none of the unofficial guides to DTDs seem to mention this operator.


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