<definitions name=”SchoolLibrary” targetNamespace="http://www.school_library.com/Library.wsdl">
xmlns:xsd=" http://www.w3.org/2001/XMLSchema ">  

  <message name="getBookRequest">
    <part name="Title" type="xsd:string"/>
  </message>

  <message name="getBookResponse">
    <part name="return" type="xsd:string"/>
  </message>  

  <interface name=”LibInterface”>
    <operation name="getBook">
      <input message="getBookRequest"/>
      <output message="getBookResponse"/>
    </operation>
  </interface>  

  <binding name="LibBinding" type="LibInterface">
    <operation name="getBook">
      <input message="getBookRequest"/>
      <output message="getBookResponse"/>
    </operation>
  </binding>  

<service>
...
</service>

</definitions>