Recursion in an XML schema?

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if you need a recursive type declaration, here is an example that might help:

<xs:schema id="XMLSchema1"
    targetNamespace="http://tempuri.org/XMLSchema1.xsd"
    elementFormDefault="qualified"
    xmlns="http://tempuri.org/XMLSchema1.xsd"
    xmlns:mstns="http://tempuri.org/XMLSchema1.xsd"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:element name="node" type="nodeType"></xs:element>

  <xs:complexType name="nodeType">    
    <xs:sequence minOccurs="0" maxOccurs="unbounded">
      <xs:element name="node" type="nodeType"></xs:element>
    </xs:sequence>
  </xs:complexType>

</xs:schema>

As you can see, this defines a recursive schema with only one node named “node” which can be as deep as desired.

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