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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: [xml-dev] 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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