<div dir="ltr" style="text-align: justify;" trbidi="on">
<ul>
<li>The <b><;binding>;</b> element provides specific details on how a <i><b>portType </b></i>operation will actually be transmitted over the wire.</li>
<li>The bindings can be made available via multiple transports, including <i><b>HTTP GET, HTTP POST, or SOAP.</b></i></li>
<li>The bindings provide concrete information on what protocol is being used to transfer <b><i>portType</i></b> operations.<br />
The bindings provide information where the service is located.</li>
<li>For <b><i>SOAP </i></b>protocol, the binding is <b><;soap:binding>;</b>, and the transport is <i><b>SOAP </b></i>messages on top of <i><b>HTTP </b></i>protocol.</li>
<li>You can specify multiple bindings for a single <b><i>portType</i></b>.</li>
</ul>
<p>The binding element has two attributes &#8211; the name attribute and the type attribute.</p>
<pre class="highlight" name="code"><;binding name="HelloWorld_Binding" type="tns:HelloWorld_PortType">;
</pre>
<p>
The name attribute defines the name of the binding, and the type attribute points to the port for the binding, in this case the &#8220;<i><b>tns:HelloWorld_PortType</b></i>&#8221; port.<br />
<b>SOAP Binding</b></p>
<p><b>WSDL 1.1</b> includes built-in extensions for <b>SOAP 1.1</b>. This enables you to specify <b>SOAP </b>specific details, including <b>SOAP </b>headers, <b>SOAP </b>encoding styles, and the <b>SOAPAction HTTP </b>header. The <b>SOAP</b> extension elements include:</p>
<p><b>soap:binding</b><br />
This element indicates that the binding will be made available via <b>SOAP</b>. The style attribute indicates the overall style of the <b>SOAP </b>message format. A style value of rpc specifies an <b>RPC </b>format.</p>
<p>The transport attribute indicates the transport of the <b>SOAP </b>messages. The value <b><i>http://schemas.xmlsoap.org/soap/http</i></b> indicates the <b>SOAP HTTP</b> transport, whereas <i><b>http://schemas.xmlsoap.org/soap/smtp</b></i> indicates the <b>SOAP SMTP</b> transport.</p>
<p><b>soap:operation</b><br />
This element indicates the binding of a specific operation to a specific <b>SOAP </b>implementation. The <i><b>soapAction </b></i>attribute specifies that the <b>SOAPAction HTTP</b> header be used for identifying the service.</p>
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<p><b>soap:body</b><br />
This element enables you to specify the details of the input and output messages. In the case of <b>HelloWorld</b>, the body element specifies the <b>SOAP </b>encoding style and the namespace <b>URN </b>associated with the specified service.</p>
<p><b>Here is the piece of code from Example section</b>:</p>
<pre class="highlight" name="code"><;binding name="HelloWorld_Binding" type="tns:HelloWorld_PortType">;
 <;soap:binding style="rpc"
 transport="http://schemas.xmlsoap.org/soap/http"/>;
 <;operation name="sayHelloWorld">;
 <;soap:operation soapAction="sayHelloWorld"/>;
 <;input>;
 <;soap:body
 encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
 namespace="urn:examples:helloworldservice"
 use="encoded"/>;
 <;/input>;
 <;output>;
 <;soap:body
 encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
 namespace="urn:dineshonjava:helloworldservice"
 use="encoded"/>;
 <;/output>;
 <;/operation>;
 <;/binding>;
</pre>
<p><i><b>References</b></i><br />
<i><b><a href="http://en.wikipedia.org/wiki/Web_Services_Description_Language" target="_blank">Wikipedia for WSDL</a></b></i></p>
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