A web service is either: a service offered by an electronic device to another electronic device, communicating with each other via the Internet, or a server running on a computer device, listening for requests at a particular port over a network, serving web documents.

1. NADAR SARSWATHI COLLEGE OF ARTS AND SCIENCE
THENI
DEPARTMENT OF INFORMATION TECHNOLOGY
CLIENT SERVER COMPUTING
WEB SERVICES HISTORY
WEB SERVICES TECHNOLOGY
PRESENTED BY:
G.KAVIYA
II. M.SC(IT)

2. SYNOPSIS
History of web services
• WHERE THE WEB WAS BORN
• HOW THE WEB BEGAN
• WEB EXTENDS
Web services technology
• COMPONENTS
• HOW DOES WEB WORK

3. HISTORY OF WEB SERVICES INVENTOR
 Sir Timothy John Berners-Lee OM KBE FRS FREng FRSA DFBCS (born 8 June 1955), also known
as TimBL, is an English computer scientist best known as the inventor of the World Wide Web. He is
a Professorial Fellow of Computer Science at the University of Oxford and a professor at
the Massachusetts Institute of Technology (MIT).Berners-Lee proposed an information management
system on 12 March 1989, then implemented the first successful communication between a Hypertext
Transfer Protocol (HTTP) client and server via the Internet in mid-November.

4. WHERE THE WEB WAS BORN
 Tim Berners-Lee, a British scientist, invented the World Wide Web (WWW) in 1989, while working at
CERN. The Web was originally conceived and developed to meet the demand for automated
information-sharing between scientists in universities and institutes around the world.
 CERN is not an isolated laboratory, but rather the focal point for an extensive community that includes
more than 17 000 scientists from over 100 countries. Although they typically spend some time on the
CERN site, the scientists usually work at universities and national laboratories in their home countries.
Reliable communication tools are therefore essential.
 The basic idea of the WWW was to merge the evolving technologies of computers, data networks and
hypertext into a powerful and easy to use global information system.

5. HOW THE WEB BEGAN

6. THE WEB EXTENDS
 Only a few users had access to a NeXT computer platform on which the first browser ran, but
development soon started on a simpler, ‘line-mode’ browser, which could run on any system. It was
written by Nicola Pellow during her student work placement at CERN.
 In 1991, Berners-Lee released his WWW software. It included the ‘line-mode’ browser, Web server
software and a library for developers. In March 1991, the software became available to colleagues
using CERN computers. A few months later, in August 1991, he announced the WWW software on
Internet newsgroups and interest in the project spread around the world.

7. WEB SERVICE TECHNOLOGY
• A web service is any piece of software that makes itself available over the internet and uses a
standardized XML messaging system. XML is used to encode all communications to a web service.
• Web services are self-contained, modular, distributed, dynamic applications that can be described,
published, located, or invoked over the network to create products, processes, and supply chains. These
applications can be local, distributed, or web-based. Web services are built on top of open standards
such as TCP/IP, HTTP, Java, HTML, and XML.
• Web services are XML-based information exchange systems that use the Internet for direct application-
to-application interaction. These systems can include programs, objects, messages, or documents.

8. CONTINUE
 A Complete Web Service Is, Therefore, Any
Service That −
 Is Available Over The Internet Or Private
(Intranet) Networks
 Uses A Standardized XML Messaging System
 Is Not Tied To Any One Operating System Or
Programming Language
 Is Self-describing Via A Common XML
Grammar
 Is Discoverable Via A Simple Find Mechanism

9. COMPONENTS
 Components of Web Services
 The basic web services platform is XML + HTTP. All the standard web services work using the
following components −
 SOAP (Simple Object Access Protocol)
 UDDI (Universal Description, Discovery and Integration)
 WSDL (Web Services Description Language)

10. HOW DOES A WEB SERVICE WORK?
 A web service enables communication among various applications by using open standards such as
HTML, XML, WSDL, and SOAP. A web service takes the help of −
 XML to tag the data
 SOAP to transfer a message
 WSDL to describe the availability of service.