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WSDL (Web Services Description Language) - (BCA / B.Tech)

What is WSDL in Hindi | WSDL in Hindi

WSDL (Web Service Description Language) is an XML-based language used to explain the description of web services. WSDL provides a standard way to describe the interface of web services, and it specifically indicates
what a web service does, how it exchanges data, and how that service can be accessed. Its main purpose is to ensure that different systems can interact with each other, whether they are developed in different programming languages or running on different platforms.

WSDL is an important tool that defines the interface and usage details of web services. It creates coordination between different platforms and programming languages and defines web services in an extended form.
It is widely used in various types of web-based applications, where interoperability and standardization of service information are important. Without WSDL, there can be many problems in the use and creation of web services,
such as not being able to make a proper connection between different systems.

Introduction of WSDL in Hindi | Introduction to WSDL

WSDL is an XML document that gives a detailed description of how to access a web service. WSDL is specially designed for SOAP (Simple Object Access Protocol) based web services, but it can also be used in REST (Representational State Transfer) web services. It explains the interface and usage methods of web services in detail and thus acts as a bridge between two different systems.

Structure of WSDL in Hindi | Structure of WSDL:

The structure of WSDL is divided into four main parts that help in understanding the functionality of a web service:

Types:

This contains a description of the data types that are used in the request and response of the web service.
Data types are defined using XSD (XML Schema Definition).

Message:

This provides a description of the messages sent and received through the web service.
Messages include inputs and outputs, which represent the information sent to the service (Request) and the information returned by the service (Response).

Port Type:

This is a group of operations of the web service.
Each operation represents a specific task that is provided by the service, such as getting, updating, or deleting data.
This acts as a service interface and also specifies the input and output of each operation.

Binding:

This represents the exchange process of the service, which mentions protocols and data formats like SOAP or HTTP.
Binding organizes operations in a specific way, so that the service can be easily accessed.

Example of WSDL Document in Hindi | Example of a WSDL document:

A WSDL document is usually written in XML. Below is a simple example of a WSDL document that provides a description of a web service called "Weather".

<definitions name="WeatherService"

targetNamespace="http://www.example.com/weather"

xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"

xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"

xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<types>

<xsd:schema targetNamespace="http://www.example.com/weather">

<xsd:element name="getWeatherRequest" type="xsd:string"/>

<xsd:element name="getWeatherResponse" type="xsd:string"/>

</xsd:schema>

</types>

</message>

</message>

</operation>

</portType>

<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>

<soap:operation soapAction="http://www.example.com/getWeather"/>

</operation>

</binding>

<soap:address location="http://www.example.com/weather"/>

</port>

</service>

</definitions>

In this example, there is a description of a web service named "WeatherService", which has an operation "getWeather". This operation takes the name of a city as input and gives the weather information as output.

Description of the main elements of WSDL in Hindi | Description of the main elements of WSDL:

definitions: This is the root element that contains all WSDL elements.
types: This defines the data types that will be exchanged.
message: This defines the input and output messages.
portType: This defines the functions provided by the service.
binding: This indicates the protocol, which can be SOAP or HTTP.
service: This defines the access point of the service, where the service is available.

Use of WSDL in Hindi | Uses of WSDL:

Interoperability:

WSDL provides interoperability between different platforms and programming languages.

This ensures that different platforms and applications can use a web service.

Description of a web service:

WSDL completely specifies the structure of a web service so that developers know how to use the service.

Tools Support:

WSDL can be used in various development tools that automatically generate code, which saves development time and effort.

Automation:

By using WSDL, automatic discovery and composition of web services is possible, as it helps in discovering, understanding, and using web services.

Advantages of WSDL in Hindi | Advantages of WSDL:

Standardized format: WSDL is based on XML, which is a standardized format, and it can be easily understood.
Automatic code generation: By using WSDL, the code for service clients and servers can be automatically generated in different programming languages.
Expansion and Scalability: It is easy to scale and expand web services using WSDL.
Easy compatibility: Through WSDL, there is easy compatibility between different platforms, such as Java and .NET systems.

WSDL (Web Services Description Language)

What is WSDL in Hindi | WSDL in Hindi

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