Chapter 10: Union and list types¶

Schema

<!--Definitive XML Schema by Priscilla Walmsley (c) 2012 Prentice Hall PTR -->
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:annotation>
    <xsd:documentation>
      This example illustrates list and union types.
    </xsd:documentation>
  </xsd:annotation>

  <xsd:element name="sizes" type="SizesType"/>

  <xsd:complexType name="SizesType">
    <xsd:choice maxOccurs="unbounded">
      <xsd:element name="size" type="SizeType"/>
      <xsd:element name="smallSize" type="SmallSizeType"/>
      <xsd:element name="internationalSize" type="InternationalSizeType"/>
      <xsd:element name="availableSizes" type="AvailableSizesType"/>
      <xsd:element name="applicableSizes" type="ApplicableSizesType"/>
    </xsd:choice>
  </xsd:complexType>

  <xsd:simpleType name="SizeType">
    <xsd:union memberTypes="DressSizeType">
      <xsd:simpleType>
        <xsd:restriction base="xsd:token">
          <xsd:enumeration value="small"/>
          <xsd:enumeration value="medium"/>
          <xsd:enumeration value="large"/>
        </xsd:restriction>
      </xsd:simpleType>
    </xsd:union>
  </xsd:simpleType>

  <xsd:simpleType name="DressSizeType">
    <xsd:restriction base="xsd:integer">
      <xsd:minInclusive value="2"/>
      <xsd:maxInclusive value="18"/>
    </xsd:restriction>
  </xsd:simpleType>

  <xsd:simpleType name="SmallSizeType">
    <xsd:restriction base="SizeType">
      <xsd:enumeration value="2"/>
      <xsd:enumeration value="4"/>
      <xsd:enumeration value="6"/>
      <xsd:enumeration value="small"/>
    </xsd:restriction>
  </xsd:simpleType>

  <xsd:simpleType name="InternationalSizeType">
    <xsd:union memberTypes="SizeType">
      <xsd:simpleType>
        <xsd:restriction base="xsd:integer">
          <xsd:minInclusive value="24"/>
          <xsd:maxInclusive value="54"/>
        </xsd:restriction>
      </xsd:simpleType>
    </xsd:union>
  </xsd:simpleType>

  <xsd:simpleType name="AvailableSizesType">
    <xsd:list itemType="SizeType"/>
  </xsd:simpleType>

  <xsd:simpleType name="ApplicableSizesType">
    <xsd:restriction>
      <xsd:simpleType>
        <xsd:list itemType="SizeType"/>
      </xsd:simpleType>
      <xsd:enumeration value="small medium large"/>
      <xsd:enumeration value="2 4 6 8 10 12 14 16 18"/>
    </xsd:restriction>
  </xsd:simpleType>

</xsd:schema>

XML Document

<sizes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:noNamespaceSchemaLocation="chapter11.xsd">
  <size>12</size>
  <size>medium</size>
  <smallSize>6</smallSize>
  <smallSize>small</smallSize>
  <internationalSize>12</internationalSize>
  <internationalSize>24</internationalSize>
  <internationalSize>large</internationalSize>
  <availableSizes>10 large 2</availableSizes>
  <applicableSizes>small medium large</applicableSizes>
</sizes>

xsData XML Document

<?xml version='1.0' encoding='UTF-8'?>
<sizes>
  <size>12</size>
  <size>medium</size>
  <smallSize>6</smallSize>
  <smallSize>small</smallSize>
  <internationalSize>12</internationalSize>
  <internationalSize>24</internationalSize>
  <internationalSize>large</internationalSize>
  <availableSizes>10 large 2</availableSizes>
  <applicableSizes>small medium large</applicableSizes>
</sizes>

xsData JSON

{
    "size": [
        12,
        "medium"
    ],
    "small_size": [
        "6",
        "small"
    ],
    "international_size": [
        12,
        24,
        "large"
    ],
    "available_sizes": [
        "10 large 2"
    ],
    "applicable_sizes": [
        "small medium large"
    ]
}

Samples Source