Web Services | Computer Science for Grade 12 PDF Download

 Page 1


Web services
Web service - is a standardized medium,protocol or language to
propagate communication between the client and server
applications on the World Wide Web. A web service is a software
module that is designed to perform a certain set of tasks.
Web services are invoked by the user directly or indirectly to
provide services to the program/software which is being used as
a part of WWW.User may be unaware about such web services.
The web services can be searched for over the network and can
also be invoked accordingly.
When invoked, the web service would be able to provide the
functionality to the client, which invokes that web service.
Page 2


Web services
Web service - is a standardized medium,protocol or language to
propagate communication between the client and server
applications on the World Wide Web. A web service is a software
module that is designed to perform a certain set of tasks.
Web services are invoked by the user directly or indirectly to
provide services to the program/software which is being used as
a part of WWW.User may be unaware about such web services.
The web services can be searched for over the network and can
also be invoked accordingly.
When invoked, the web service would be able to provide the
functionality to the client, which invokes that web service.
Web services
Many people think that the internet and the world wide web
(WWW) are the same thing. While they are closely linked, they
are very different systems.
The internet is a huge network of computers all connected
together. The world wide web (‘w ww ’ or ‘w eb’ for short) is a
collection of webpages found on this network of computers. Our
web browser uses the internet to access the web.
The World Wide Web is a way of exchanging information
between computers on the Internet, tying them together into a
vast collection of interactive multimedia resources.
World Wide Web was created by Timothy Berners Lee in 1989 at
CERN in Geneva. World Wide Web came into existence as a
proposal by him, to allow researchers to work together
effectively and efficiently at CERN. Eventually it became World
Wide Web.
Page 3


Web services
Web service - is a standardized medium,protocol or language to
propagate communication between the client and server
applications on the World Wide Web. A web service is a software
module that is designed to perform a certain set of tasks.
Web services are invoked by the user directly or indirectly to
provide services to the program/software which is being used as
a part of WWW.User may be unaware about such web services.
The web services can be searched for over the network and can
also be invoked accordingly.
When invoked, the web service would be able to provide the
functionality to the client, which invokes that web service.
Web services
Many people think that the internet and the world wide web
(WWW) are the same thing. While they are closely linked, they
are very different systems.
The internet is a huge network of computers all connected
together. The world wide web (‘w ww ’ or ‘w eb’ for short) is a
collection of webpages found on this network of computers. Our
web browser uses the internet to access the web.
The World Wide Web is a way of exchanging information
between computers on the Internet, tying them together into a
vast collection of interactive multimedia resources.
World Wide Web was created by Timothy Berners Lee in 1989 at
CERN in Geneva. World Wide Web came into existence as a
proposal by him, to allow researchers to work together
effectively and efficiently at CERN. Eventually it became World
Wide Web.
Web services
Web architecture –
Web is a two – tiered architecture.
• A web browser display information contents
• Web server that transfers information to the client
Page 4


Web services
Web service - is a standardized medium,protocol or language to
propagate communication between the client and server
applications on the World Wide Web. A web service is a software
module that is designed to perform a certain set of tasks.
Web services are invoked by the user directly or indirectly to
provide services to the program/software which is being used as
a part of WWW.User may be unaware about such web services.
The web services can be searched for over the network and can
also be invoked accordingly.
When invoked, the web service would be able to provide the
functionality to the client, which invokes that web service.
Web services
Many people think that the internet and the world wide web
(WWW) are the same thing. While they are closely linked, they
are very different systems.
The internet is a huge network of computers all connected
together. The world wide web (‘w ww ’ or ‘w eb’ for short) is a
collection of webpages found on this network of computers. Our
web browser uses the internet to access the web.
The World Wide Web is a way of exchanging information
between computers on the Internet, tying them together into a
vast collection of interactive multimedia resources.
World Wide Web was created by Timothy Berners Lee in 1989 at
CERN in Geneva. World Wide Web came into existence as a
proposal by him, to allow researchers to work together
effectively and efficiently at CERN. Eventually it became World
Wide Web.
Web services
Web architecture –
Web is a two – tiered architecture.
• A web browser display information contents
• Web server that transfers information to the client
Web services
HTML – Hyper text markup language is a document design
language not a programming language. It provide various
kinds of tags(commands) used to define the structure and
appearance of web page.
HTML was created by Sir Tim Berners-Lee in late 1991 but
was not released officially, which was published in 1995 as
HTML 2.0. HTML5 is the latest evolution of the standard that
defines HTML.
Page 5


Web services
Web service - is a standardized medium,protocol or language to
propagate communication between the client and server
applications on the World Wide Web. A web service is a software
module that is designed to perform a certain set of tasks.
Web services are invoked by the user directly or indirectly to
provide services to the program/software which is being used as
a part of WWW.User may be unaware about such web services.
The web services can be searched for over the network and can
also be invoked accordingly.
When invoked, the web service would be able to provide the
functionality to the client, which invokes that web service.
Web services
Many people think that the internet and the world wide web
(WWW) are the same thing. While they are closely linked, they
are very different systems.
The internet is a huge network of computers all connected
together. The world wide web (‘w ww ’ or ‘w eb’ for short) is a
collection of webpages found on this network of computers. Our
web browser uses the internet to access the web.
The World Wide Web is a way of exchanging information
between computers on the Internet, tying them together into a
vast collection of interactive multimedia resources.
World Wide Web was created by Timothy Berners Lee in 1989 at
CERN in Geneva. World Wide Web came into existence as a
proposal by him, to allow researchers to work together
effectively and efficiently at CERN. Eventually it became World
Wide Web.
Web services
Web architecture –
Web is a two – tiered architecture.
• A web browser display information contents
• Web server that transfers information to the client
Web services
HTML – Hyper text markup language is a document design
language not a programming language. It provide various
kinds of tags(commands) used to define the structure and
appearance of web page.
HTML was created by Sir Tim Berners-Lee in late 1991 but
was not released officially, which was published in 1995 as
HTML 2.0. HTML5 is the latest evolution of the standard that
defines HTML.
Web services
Basic structure of HTML document –
<html>
<head>
<title>simple document</title>
</head>
<body>
<p>a simple paragraph</p>
</body>
</html>
Save above content in text editor with .html extension and open
it in web browser to run it(tags).Generally/Most of the tags are
written as part of <body> tag.
List of HTML Tags