World wide web An Introduction
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The World Wide Web was created in 1991 by Tim Berners-Lee as a way to share scientific documents over the Internet. It uses HTML pages that can be accessed via HTTP and linked together through hyperlinks. While often used interchangeably, the Web is actually a subset of the larger Internet, which includes other applications like email and file transfer. The Web evolved from static publishing in its early Web 1.0 stage to include more participation and social features in Web 2.0, and aims to add semantic capabilities in its ongoing development of Web 3.0.
World wide web An Introduction
- 1. Part-I
- 2. The World Wide Web (WWW) is a network of online content that is formatted in HTML and accessed via HTTP. The term refers to all the interlinked HTML pages that can be accessed over the Internet. The World Wide Web was originally designed in 1991 by Tim Berners-Lee while he was a contractor at CERN. The World Wide Web is most often referred to simply as “The Web."
- 3. It is important to know that this is not a synonym for the Internet. The World Wide Web, or just "the Web," as ordinary people call it, is a subset of the Internet. The Web consists of pages that can be accessed using a Web browser. The Internet is the actual network of networks where all the information resides. Things like Telnet, FTP, Internet gaming, Internet Relay Chat (IRC), and e-mail are all part of the Internet, but are not part of the World Wide Web.
- 4. In the beginning, World Wide Web was introduced as a medium for sharing scientific and research documents, especially, between government organizations and academic institutions. But with the passage of time, it evolved and crossed the limits defined for it. Initially, till 1990, the WWW(World Wide Web) remains within the boundaries of CERN (a research organization), but by 1991, it became available to anyone using internet.
- 5. Web 1.0 – The World Wide Web (1990 – 2000) Remain limited mostly to static websites. Mostly publishing / Brochure-ware. Limited to reading only for majority. Proprietary and closed access. Corporations mostly, no communities. HTTP, HTML
- 6. Web 2.0 – The Social Web (2000 – 2010) Publishing as well as Participation Social Media, Blogging, Wikis RSS – Syndicate site contents. Rich User Experience Tagging Keyword Search AJAX, JavaScript Frameworks (jQuery, Dojo, YUI, Ext Js etc), XML, JSON
- 7. Web 3.0 – The Semantic Web (2010 – onward) Mostly Drag n Drop Highly mobile oriented Widgets Micro blogging Cloud and Grid Computing Open ID Semantic Search Semantic Techniques like RDF, SWRL, OWL etc.
- 8. • Web page is a document available on world wide web. Web Pages are stored on web server and can be viewed using a web browser. • A web page can contain huge information including text, graphics, audio, video and hyper links. These hyper links are the link to other web pages. • These documents are written in HTML (hypertext markup language) and are translated by your Web browser. Web pages can either be static or dynamic.
- 9. • A Web page is not the same thing as a Web site. A Web site is a collection of pages. A Web page is an individual HTML document. • Collection of linked web pages on a web server is known as website. There is unique Uniform Resource Locator (URL) is associated with each web page.
- 13. • Static web pages are also known as flat or stationary web page. They are loaded on the client’s browser as exactly they are stored on the web server. Such web pages contain only static information. User can only read the information but can’t do any modification or interact with the information.
- 15. • A dynamic website can contain client-side scripting or server- side scripting to generate the changing content, or a combination of both scripting types. These sites also include HTML programming for the basic structure. The client-side or server-side scripting takes care of the guts of the site. • It is possible to change a portaion of a web page without loading the entire web page. It has been made possible using Ajax technology.
- 16. HTTP REQUEST ASK FOR DATA Receive Data & create a webpage using PHP Script RESPONSE