xml-dev - Order of Declarations in DTD subsets

[Peter Murray-Rust <peter@ursus.demon.co.uk>]

Is it required that a declaration in the subset come before it is used. [I
have tried to find this in the spec and not been able to - please forgive
me if it's there].

An example:

ELEMENTs must be declared for ATTLIST in validatable documents. So is the
following legal in this case:

<!ATTLIST FOO BAR CDATA #REQUIRED>
<!ELEMENT FOO ANY>

In a WF document this might have a different effect - the ATTLIST
declaration is WF and implicitly creates an ELEMENT declaration. When this
ELEMENT is declared, is it then an error?

Of course its normal and natural to predeclare things before their use but
it's not necessary in some languages.

	P.





Peter Murray-Rust, Director Virtual School of Molecular Sciences, domestic
net connection
VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary
http://www.venus.co.uk/vhg

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