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   Re: Parser for DTDs

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  • From: francis <francis@redrice.com>
  • To: Matt Mower <m.mower@unl.ac.uk>
  • Date: Tue, 21 Apr 1998 17:00:04 +0100


Matt Mower wrote:
> Hi.
> I am looking for a java parser that when fed a DTD returns a model
> representing all the valid documents that can be expressed using that
> DTD, i.e. for any given element type I need to be able to determine what
> are valid sub-elements/attributes/content. One additional constraint is
> that I need to parse the DTD outside of the context of an XML document.

I can recommend Aelfred from microstar.com - it gives your program
callbacks which get called for DTD events like new element and tag
definitions as well as the expected XML events. There is a nice simple
DtdDemo.java program which you can hack to slap things into a Swing

Aelfred parses the DTD from the XML document however - if you need to
parse the DTD directly then the IBM parser certainly mentions this
feature in its documentation, the Microsoft one also mentions it as
available via a slightly non-recommended direct access to the the parser
object. I haven't used either yet...


Hmmm - just cut and pasted IBM's command line DTD demo from the
codumentation into a DOS box

	jre -cp "xml4j.jar" GeneratingSample personal.dtd

and it worked straight off - nice...


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