minOccurs dependent on other element value / xpath

• From: Neff, Sam [NEA] <SNeff@nea.org>
• Date: Tue, 25 Jun 2002 09:12:50 -0400 (EDT)
• To: <xmlschema-dev@w3.org>
• Message-ID: <3A0619C996057D42B5326351A04CEA373AAB24@NEA-HQ-S4.NEA.LOC>

Is it possible to specify minOccurs dynamically; dependent on the value of an element in the schema instance?

For example, if I have two XML documents:

<package>
   <header>
      <name>2001-02 Boise</name>
      <isFinal>1</isFinal>
   </header>
   <plans>
      <plan>some plan</plan>
   </plans>
</package>


And


<package>
   <header>
      <name>2001-02 Boise</name>
      <isFinal>0</isFinal>
   </header>
   <plans/>
</package>


With a corresponding schema:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
   <xs:element name="package">
      <xs:complexType>
         <xs:all>
            <xs:element name="header">
               <xs:complexType>
                  <xs:all>
                     <xs:element name="name" type="xs:string"/>
                     <xs:element name="isFinal" type="xs:boolean"/>
                  </xs:all>
               </xs:complexType>
            </xs:element>
            <xs:element name="plans" minOccurs="0">
               <xs:complexType>
                  <xs:sequence>

                     <xs:element 
                        name="plan" 
                        type="xs:anyType" 
                        minOccurs="0" 
                        maxOccurs="unbounded"/>

                        <!-- I want minOccurs to be 1 when
                             /package/header/isFinal=1 -->

                  </xs:sequence>
               </xs:complexType>
            </xs:element>
         </xs:all>
      </xs:complexType>
   </xs:element>
</xs:schema>


The minOccurs="0" on element "plan".  In cases where the value of element "isFinal" (package/header/isFinal) is true, I want minOccurs on "plan" to be 1.

Is there any way to accomplish this in XML Schema?

Thanks,

Samuel Neff



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Received on Tuesday, 25 June 2002 09:34:55 UTC