How to link XML to XSD using schemaLocation or noNamespaceSchemaLocation?

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How to link an XSD to an XML document depends upon whether the XML document is using namespaces or not…

Without namespaces

Use xsi:noNamespaceSchemaLocation to provide a hint as to the XSD to be used:

  • XML

    <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="example.xsd">
  <!-- ... -->
</root>

  • XSD

    <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:element name="root">
    <!-- ... -->
  </xsd:element>
</xsd:schema>

With namespaces

Use xsi:schemaLocation to provide a hint as to the XSD to be used:

  • XML

    <ns:root xmlns:ns="http://example.com/ns"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://example.com/ns example-ns.xsd">
  <!-- ... -->
</ns:root>

  • XSD

    <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://example.com/ns">
  <xsd:element name="root">
    <!-- ... -->
  </xsd:element>
</xsd:schema>

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