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Re: XML Schema quiz: 3 elements and at least one must be prese

• From: "Andrew Welch" <andrew.j.welch@g...>
• To: "Costello, Roger L." <costello@m...>
• Date: Thu, 14 Aug 2008 14:01:40 +0100

> Consider this problem: you have 3 elements - A, B, C - and you need at
> least one of them to be present in your XML instance document.

How about:

    <xs:element name="baseType"/>

    <xs:element name="A" substitutionGroup="baseType"/>
    <xs:element name="B" substitutionGroup="baseType"/>
    <xs:element name="C" substitutionGroup="baseType"/>

    <xs:complexType name="whatever">
        <xs:sequence>
            <xs:element ref="baseType" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>

?

-- 
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/

• Follow-Ups:
  • Re: XML Schema quiz: 3 elements and at least one must bepresent
    • From: George Cristian Bina <george@o...>

• References:
  • XML Schema quiz: 3 elements and at least one must be present
    • From: "Costello, Roger L." <costello@m...>