Re: building an object model of a XML schema

[Adriano Venturini <venturi@itc.it>]

Thank you all for the answers, that suggest useful tools and a very
interesting reading, I'll use these information too, but
what I am looking for is an API that allows to read a schema, to read which
elements it defines, their types, their relationships, their attributes and
so on.
Probably is something similar to what is described in the  DOM Level 3
Abstract Schema as Arnold (thanks) suggested.
Is there any library implementing something like this ?

Bye,
Adriano



> In addition to Castor, there are JAXB (http://java.sun.com/xml/jaxb) and
> Zeus (http://zeus.enhydra.org/index.html). Oracle has a class generator
> that runs off DTDs, and I think IBM does, too. Quick
> (http://jxquick.sourceforge.net/) does similar work, but has a
> proprietary schema language (I think). Note that all of these generate
> classes at design time, not run time. Some (most?) then provide code for
> marshalling XML to objects and vice versa.
>
> You might also be interested in the following paper, which describes the
> mapping from the schema data model to object models:
>
>    http://www.rpbourret.com/xml/SchemaMap.htm
>
> -- Ron
>
> > Michael Brennan wrote:
> >
> > I haven't really seen much for this. You can check out Castor, though:
> > http://castor.exolab.org/  It's the one tool I know of for this sort
> > of thing. If you find anything else, let me know.
> >
> >      -----Original Message-----
> >      From: Adriano Venturini [mailto:venturi@itc.it]
> >      Sent: Tuesday, July 10, 2001 7:03 AM
> >      To: xml-dev@lists.xml.org
> >      Subject: building an object model of a XML schema
> >
> >      Hi all,
> >      I have defined a set of schemas that model the data model of
> >      our project.
> >      We use the schemas for validating purpose, but we need also
> >      to programmatically read the schema and to understand the
> >      structure of a document compliant with the schema.
> >      For example, given a schema model that contains  a
> >      LODGING_SERVICE  element that contains three elements: NAME,
> >      LOCATION and COST,
> >      I need an API that returns  this structure, along with the
> >      datatypes of the NAME, the LOCATION and the COST fields
> >      (i.e. like a data dictionary of an RDBMS ).
> >      Obviously I could use an XML parser, but I would implement a
> >      very limitated component.
> >
> >      Is there any library that read a schema and provide an
> >      object model of the schema itself ?
>