Describe why WSDL document is important for creating a web service client?

Expert Solution

WSDL is often used in combination with SOAP and XML Schema to provide web services over the Internet. A client program connecting to a web service can read the WSDL to determine what functions are available on the server. Any special datatypes used are embedded in the WSDL file in the form of XML Schema.

It also allows the client application to understand the methods available in the web service. The WSDL file makes it very easy for the web service to be implemented in one programming language and called from a different programming language. The WSDL document normally consists of a message

Importance of WSDL:

WSDL stands for Web Services Description Language
WSDL is used to describe web services
WSDL is written in XML
WSDL document provides contract and technical details of the web services for client applications without exposing the underlying implementation technologies.
WSDL provides a machine-readable description of how the service can be called, what parameters it expects, and what data structures it returns.

Components of WSDL:Some of the different tags in WSDL xml are:

xsd:import namespace and schemaLocation: provides WSDL URL and unique namespace for web service.
message: for method arguments
part: for method argument name and type
portType: service name, there can be multiple services in a wsdl document.
operation: contains method name
soap:address for endpoint URL.

venereology answered 7 months ago

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