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modelling the business rule "at least one of the elements"

• From: "Joselito D. Moreno" <joenmoreno@g...>
• To: xml-dev@l...
• Date: Mon, 20 Nov 2006 14:59:35 -0600

Hi,

I'm struggling with designing an XML Schema that has a conditional
part to it.  Here's my issue:

I would like to represent data, let's call it "parent" which can
contain "at least" one of 3 elements ("child1",  "anotherchild", and
"yetanotherchild")

For example, this would be a valid "parent" element:
<parent>
    <child1>value of child 1</child1>
    <anotherchild>value of anotherchild</anotherchild>
    <yetanotherchild>value of yetanotherchild</yetanotherchild>
</parent>

This would be a valid "parent" element:
<parent>
    <anotherchild>value of anotherchild</anotherchild>
</parent>

This would be a valid "parent" element:
<parent>
    <child1>value of child 1</child1>
    <yetanotherchild>value of yetanotherchild</yetanotherchild>
</parent>

This would be a INVALID "parent" element because there should be at
least one of the child elements:
<parent>
</parent>

This would be a INVALID "parent" element because the parent element
can only contain at most 1 occurence of each kind of child element.
<parent>
    <child1>value of child 1</child1>
    <yetanotherchild>value of yetanotherchild</yetanotherchild>
    <yetanotherchild>value of yetanotherchild</yetanotherchild>
</parent>

Thanks in advance,

Joen Moreno

• Follow-Ups:
  • Re: modelling the business rule "at least one of the elements"
    • From: "Rick Jelliffe" <rjelliffe@a...>
  • RE: modelling the business rule "at least one of the elements"
    • From: "Paul Spencer" <xml-dev-list@b...>