How? is the binding

A binding binds the abstract model into an application and transport protocol: HTTP GET/POST/DELETE/PUT, SOAP 1.2 over HTTP GET/POST, …

<binding name="ValidatorHttpGet" type="val:ValidatorInterface">
    <feature
      uri='http://www.w3.org/2003/11/http'
      required='true'/>
    <property
      uri='http://www.w3.org/2003/11/http/Method'>
      <value>GET</value>
    </property>
    <operation name="getResult">
      <http:operation location="/getResult" />
      <input>
        <http:urlEncoded />
      </input>
      <output>
      </output>
    </operation>
</binding>