Web Service Description Language (WSDL)
Machine readable description (XML) of a web service. Used here to define server's methods and parameters.

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="urn:whoisDataService.whois.comms.ws.dsdata.co.uk" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:apachesoap="http://xml.apache.org/xml-soap" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:intf="urn:whoisDataService.whois.comms.ws.dsdata.co.uk" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:impl="urn:whoisDataService.whois.comms.ws.dsdata.co.uk" xmlns="http://schemas.xmlsoap.org/wsdl/">
  <wsdl:types>
    <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:whoisDataService.whois.comms.ws.dsdata.co.uk">
      <import namespace="http://schemas.xmlsoap.org/soap/encoding/"/>
      <complexType name="WhoisRequest">
        <sequence>
          <element name="domain" nillable="true" type="xsd:string"/>
          <element name="clientID" nillable="true" type="xsd:string"/>
          <element name="emailAddress" nillable="true" type="xsd:string"/>
        </sequence>
      </complexType>
      <element name="WhoisRequest" nillable="true" type="impl:WhoisRequest"/>
      <complexType name="WhoisResult">
        <sequence>
          <element name="result" type="xsd:int"/>
          <element name="resultDescription" nillable="true" type="xsd:string"/>
          <element name="server" nillable="true" type="xsd:string"/>
          <element name="domainName" nillable="true" type="xsd:string"/>
          <element name="resultText" nillable="true" type="xsd:string"/>
          <element name="registrar" nillable="true" type="xsd:string"/>
          <element name="registrarURL" nillable="true" type="xsd:string"/>
          <element name="registrant" nillable="true" type="xsd:string"/>
          <element name="status" nillable="true" type="xsd:string"/>
          <element name="nameServers" nillable="true" type="xsd:string"/>
          <element name="registrantAddress" nillable="true" type="xsd:string"/>
          <element name="country" nillable="true" type="xsd:string"/>
          <element name="updatedOn" nillable="true" type="xsd:dateTime"/>
          <element name="createdOn" nillable="true" type="xsd:dateTime"/>
          <element name="expiresOn" nillable="true" type="xsd:dateTime"/>
        </sequence>
      </complexType>
      <complexType name="ArrayOfWhoisResult">
        <complexContent>
          <restriction base="soapenc:Array">
            <attribute ref="soapenc:arrayType" wsdl:arrayType="impl:WhoisResult[]"/>
          </restriction>
        </complexContent>
      </complexType>
      <element name="ArrayOfWhoisResult" nillable="true" type="impl:ArrayOfWhoisResult"/>
    </schema>
  </wsdl:types>
  <wsdl:message name="getWhoisDataResponse">
    <wsdl:part name="getWhoisDataReturn" type="intf:ArrayOfWhoisResult"/>
  </wsdl:message>
  <wsdl:message name="getWhoisDataRequest">
    <wsdl:part name="in0" type="intf:WhoisRequest"/>
  </wsdl:message>
  <wsdl:portType name="WhoisData">
    <wsdl:operation name="getWhoisData" parameterOrder="in0">
      <wsdl:input name="getWhoisDataRequest" message="intf:getWhoisDataRequest"/>
      <wsdl:output name="getWhoisDataResponse" message="intf:getWhoisDataResponse"/>
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="WhoisDataSoapBinding" type="intf:WhoisData">
    <wsdlsoap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
    <wsdl:operation name="getWhoisData">
      <wsdlsoap:operation soapAction=""/>
      <wsdl:input name="getWhoisDataRequest">
        <wsdlsoap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:whoisDataService.whois.comms.ws.dsdata.co.uk"/>
      </wsdl:input>
      <wsdl:output name="getWhoisDataResponse">
        <wsdlsoap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="urn:whoisDataService.whois.comms.ws.dsdata.co.uk"/>
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>
  <wsdl:service name="WhoisDataService">
    <wsdl:port name="WhoisData" binding="intf:WhoisDataSoapBinding">
      <wsdlsoap:address location="http://wavendon.dsdata.co.uk/axis/services/WhoisData"/>
    </wsdl:port>
  </wsdl:service>
</wsdl:definitions>