Bindings

• A binding defines message format and protocol details for operations and messages defined by a particular portType.
• The interfaces are bound to specific network and transport protocols. It is akin to implementing an interface.
• The name attribute provides a unique name among all bindings defined within in the enclosing WSDL document.
• A binding references the portType that it binds using the type attribute.
• A binding must specify exactly one protocol

<binding name="StockQuoteSoap" type="tns:StockQuotePortType">
  <soap:binding style="document" transport="http://example.com/smtp"/>
  <operation name="SubscribeToQuotes">
    <input message="tns:SubscribeToQuotes">
      <soap:body parts="body" use="literal"/>
      <soap:header message="tns:SubscribeToQuotes" part="subscribeheader" use="literal"/>
    </input>
  </operation>
</binding>