James Tauber jtauber at jtauber.com
Thu May 27 04:14:25 BST 1999

>I would like to have examples on the following
>1. nested DTDs
>2. two DTDs used within a document
>3. nested DTDs used within a document
>Are the above scenarios possible? Thanks in advance.

A document has only one DTD. However, a DTD is principally just a set of
markup declarations. It is possible to take the markup declarations of two
DTDs and have a document use the union as a DTD. Note that you would have to
modify the content models in at least one of the original DTDs in order to
allow for elements from one DTD to include elements from the other.

This is made easy where content models are made extensible in the first
place via a parameter entity. You just override the parameter entity to
include the extra elements.


xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)

More information about the Xml-dev mailing list