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Difference between WSDL and SOAP

Difference between WSDL and SOAP

WSDL and SOAP are two important web service specifications. Though they have some similarities, there are also some key differences between them. In this post, we’ll take a look at the key differences between WSDL and SOAP. We’ll also explore the benefits of each specification and discuss when each one is best suited for use. Finally, we’ll provide a few tips on how to get started with both WSDL and SOAP development. So, let’s get started!

What is WSDL?

WSDL is an XML-based language that provides a way to describe Web services and how they should be accessed. WSDL is often used in conjunction with SOAP and UDDI to provide a complete description of a Web service. WSDL is short for Web Services Description Language. WSDL was developed by W3C. WSDL is based on XML Schema and XLink. WSDL specifies the location of the service, the interface to the service, and the binding to the WSDL port type. WSDL 1.1 was released on March 2001. WSDL 2.0 was released on June 2007. WSDL 1.2 became a W3C Recommendation on June 2007. WSDL 2.0 became a W3C Recommendation on June 2007.

What is SOAP?

SOAP is a SOAP-based protocol for SOAPing SOAP callers. SOAP is a SOAP-based SOAP SOAP SOAP that uses XML to SOAP SOAP messages. It was created by SOAP in order to SOAP SOAP calls over the Internet. SOAP is a transport-independent protocol, which means that it can be used with any transport protocol, such as HTTP, HTTPS, or SMTP.

SOAP messages are formatted in XML and are typically sent using HTTP POST requests. A SOAP message consists of an envelope, which contains headers and a body. The envelope defines the structure of the message, and the headers contain information about the message, such as who the message is from and what the message is about. The body contains the actual data that is being sent in the message.

Difference between WSDL and SOAP

  • WSDL and SOAP are both web services technologies. WSDL is an XML format for describing network services. SOAP is a protocol for accessing web services. WSDL is sometimes compared to a contract for a web service.
  • It describes the methods that can be called on the web service, the parameters that can be passed to those methods, and the data types that are used by the methods. SOAP is sometimes compared to an envelope for a web service.
  • It defines the structure of the messages that are exchanged between the client and server. WSDL and SOAP are both important technologies for web services, but they serve different purposes. WSDL is used to describe the capabilities of a web service, while SOAP is used to access those capabilities.


In conclusion, SOAP is a messaging protocol that uses XML to encode information, while WSDL is an interface definition language used to describe the functionality of Web services. While they are both important in the world of Web services, SOAP is more commonly used because it is simpler and faster than WSDL.

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