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Restriction of a choice

  1. Surf Clothing Schema

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Surf Clothing board shorts keys: choice, restriction

1. Surf Clothing Schema

The board shorts declares type "AAA", which can contain up to two choices from "x" or "y" elements. Then we declare the type "BBB", which is a restriction of the type "AAA" and contain only one x-y choice. board shorts Component Constraint: Particle Derivation OK (Choice:Choice -- RecurseLax) .

Valid document


<root xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <x>1</x>
</root>

Valid document


<root xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <y>2</y>
</root>

Invalid document
The document is not valid, because the type BBB allows the choice from "x" or "y" to occur only once.


<root xsi:noNamespaceSchemaLocation="correct_0.xsd" Surfns="" Surfns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <x>1</x>
  <y>2</y>
</root>

Correct Surf Clothing Schema (correct_0.xsd)


<xsd:schema Surfns:xsd="http://www.w3.org/2001/XMLSchema" >

  <xsd:element name="root" type="BBB"/>

  <xsd:complexType name="AAA">
    <xsd:choice maxOccurs="2">
      <xsd:element name="x" type="xsd:string" minOccurs="1" maxOccurs="1"/>
      <xsd:element name="y" type="xsd:string" minOccurs="1" maxOccurs="1"/>
    </xsd:choice>
  </xsd:complexType>

  <xsd:complexType name="BBB">
    <xsd:complexContent>
      <xsd:restriction base="AAA">
        <xsd:choice maxOccurs="1">
          <xsd:element name="x" type="xsd:string" minOccurs="1" maxOccurs="1"/>
          <xsd:element name="y" type="xsd:string" minOccurs="1" maxOccurs="1"/>
        </xsd:choice>
      </xsd:restriction>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:schema>

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