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Re: Can XML Schemas do this?

• To: "Brian Burridge" <maillist@b...>,"xml-dev" <xml-dev@l...>
• Subject: Re: Can XML Schemas do this?
• From: "Mike Plusch" <mplusch@c...>
• Date: Mon, 20 Jan 2003 10:12:58 -0500
• Organization: Clear Methods
• References: <1043073881.11126.1.camel@m...>

Water Type and Contract can handle that.
Here's defining a new 'tag/class' named
person.  'Person' has a name that is a required
value of type string.
'Person' also has optional 'age' and 'birth'
fields.  The precondition also states that
one of the optional fields must be filled
in.  The fields/elements can be given in
any order.


<defclass person
   name=required=string
   age=optional=integer
   birth=optional=datetime
   _precond=<defmethod> <not age.<is optional/>.
                             <and birth.<is optional/> />
            </defmethod>
</defclass>


_Mike Plusch
CTO, Clear Methods
http://www.clearmethods.com/
http://www.waterlang.org/

----- Original Message -----
From: Brian Burridge
To: XML DEV
Sent: Monday, January 20, 2003 9:44 AM
Subject:  Can XML Schemas do this?


I have an xml document, where we want elements to be able to appear in
any order. Some are required, others aren't. And in many cases if you
have tag A then you don't need tag B, and vice versa.

Problem is, I need to use the ALL tag and have choices and groups
within
it, but you can't.

Is there a way around this?

Brian Burridge


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