<h3 id="web-service-definition">Web Service Definition</h3>
<p>Web service is a standard or protocol that facilitates data exchange in the form of XML (Extensible Markup Language) between client and server applications over the internet.</p>
<h3 id="web-service-architecture">Web Service Architecture</h3>
<p>The web service architecture comprises of three roles which are:</p>
<ol>
<li>Provider - Creates the web service and offers it to the client application</li>
<li>Requestor - Client application needs to communicate with the web service</li>
<li>Broker - Provides access to the Universal Description, Discovery and Integration, UDDI (helps the client application to find the web service)</li>
</ol>
<h3 id="web-service-types">Web Service Types</h3>
<ul>
<li>REST =  Representational State Transfer 
Uses HTTP (which supports HTTP methods and CRUD-oriented services) or  Uniform Resource Identifier (URI)</li>
<li>SOAP = Simple Object Access Protocol
Uses XML for data and HTTP and SMTP for transmission</li>
</ul>
<h3 id="web-service-vs-web-api">Web Service vs Web API</h3>
<p>Web services are API but not all APIs are web services.
Web services use 3 main communication style which include REST, SOAP and XML-RPC while web APIs can us any communication style.</p>


### Web Service Definition
Web service is a standard or protocol that facilitates data exchange in the form of XML (Extensible Markup Language) between client and server applications over the internet.

### Web Service Architecture
The web service architecture comprises of three roles which are:
1. Provider - Creates the web service and offers it to the client application
2. Requestor - Client application needs to communicate with the web service
3. Broker - Provides access to the Universal Description, Discovery and Integration, UDDI (helps the client application to find the web service)

### Web Service Types
- REST =  Representational State Transfer 
Uses HTTP (which supports HTTP methods and CRUD-oriented services) or  Uniform Resource Identifier (URI)
- SOAP = Simple Object Access Protocol
Uses XML for data and HTTP and SMTP for transmission

### Web Service vs Web API
Web services are API but not all APIs are web services.
Web services use 3 main communication style which include REST, SOAP and XML-RPC while web APIs can us any communication style.


