CODEWITHSUNDEEP
xmlxsd
user3097006
user3097006

Reputation: 1

Checking that one value is selected as yes within three Boolean values

I was wondering if it was possible to place a restriction on 3 yes/no elements. I want atleasst one of the three to be selected as a 'yes'

The bpplena values are down below. Any idea on how to place this restriction?

<xs:element name="ResponseTime" minOccurs="0" maxOccurs="unbounded">
      <xs:complexType>
        <xs:sequence>
          <xs:element name="TwelveHour" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
          <xs:element name="SevenDay" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
          <xs:element name="FortyEightHours" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
          <xs:element name="Departure" minOccurs="1" maxOccurs="1">
            <xs:simpleType>
              <xs:restriction base="xs:string">
                <xs:maxLength value="250"/>
              </xs:restriction>
            </xs:simpleType>
          </xs:element>
        </xs:sequence>
      </xs:complexType>
    </xs:element>

Upvotes: 0

Views: 186

Answers (1)

kjhughes
kjhughes

Reputation: 111686

If you're using XML Schema 1.1, you can specify co-occurrence constraints via XPath 2.0 using xs:assert like this (untested):

<xs:element name="ResponseTime" minOccurs="0" maxOccurs="unbounded">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="TwelveHour" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
      <xs:element name="SevenDay" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
      <xs:element name="FortyEightHours" type="xs:boolean" minOccurs="1" maxOccurs="1"/>
      <xs:element name="Departure" minOccurs="1" maxOccurs="1">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:maxLength value="250"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:element>
    </xs:sequence>
    <xs:assert test="count((TwelveHour|SevenHour|FortyEightHours)[. = 'true']) gt 0"/>
  </xs:complexType>
</xs:element>

If you're using XML Schema 1.0, you cannot express such a constraint in the schema, but you could use Schematron or check it at the application level.

Upvotes: 1

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