Bruce D'Arcus wrote:
> On 7/17/05, Mauritz Jeanson <> wrote:
>>> -----Original Message-----
>>> From: Thomas Schraitle
>
> [... snip ...]
>
>>> I think, that's not the whole story: XML needs a public _and_
>>> a system identifier in the DOCTYPE declaration.
>> Just a small clarification: a valid XML document must have a system
>> identifier. It may also have a public identifier, but that is not required.
>
> Actually, a valid xml document doesn't need a doctype declaration at
> all. I never use them in my documents.
>
No and no. A valid XML document MUST have a DOCTYPE declaration. A
merely well-formed document does not need one, but it is required for
validity.
In order for a document to be valid the document type declaration must
contain either a system identifier pointing to an external DTD subset or
an internal DTD subset or both. A valid document may but does not have
to have a public identifier. However XML does not allow public
identifiers without system identifiers in DOCTYPE declarations. Even if
you use the PUBLIC keyword, you most provide both a public ID and a
system ID.
--
Elliotte Rusty Harold
XML in a Nutshell 3rd Edition Just Published!
http://www.cafeconleche.org/books/xian3/
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim
