WWW and Elements of Web

WWW and Elements of Web

WWW

  • An interlinked collected of hypertext document (web pages) residing on web server & other documents, menu and database, available via URLs.
  • Web documents are marked for formatting and linking with HTML and web servers use HTTP to deliver web pages.
  • WWW is a software application that makes it is and possible for nearly any one to publish and browse hypertext document on the internet.
  • The World Wide Web is a collection of millions of file stored on thousands of computer called web servers all over the world.
  • WWW is a most common access method of internet resources.

ELEMENTS OF WEB


WEB PAGE:-

  • Web page is a resource of information that is suitable for the World Wide Web and can be accessed through web browser. This information is usually in HTML or XHTML format, and may provide navigation to other web pages via hypertext links.
  • Web pages may be retrieved by local computer from a remote web server the web server may restrict access only to a private network for example corporate intranet.
  • You can also publish pages on the world wide web WebPages are requested and served from web servers using HTTP.
  • WebPages may consist of files or static text within web server's file system.
  • The web server may construct XHTML for each webpage when it is requested by browser for dynamic WebPages.


WEB SITE:-

  • The first online website appeared in 1991; on 30th April 1995 the WWW would be free to anyone.
  • A website is a collection of WebPages, images, videos or other digital assets that is hosted on the web server and accessible via internet.
  • A webpage is documenting typically written in (X) HTML that is almost always accessible via HTTP. A protocol that transfers information from the web server to display in web browser.
  • The pages of websites can usually be accessed from a common URL, some websites require a subscription to access some are free accessible.


WEB BROWSER:-

  • A web browser can have graphical user interface like internet explorer, Mozilla fire fox or opera or can be text based browser of lynx.
  • Users of fully graphical browsers may still disable the download and viewing images and other media to save time, network bandwidth or just to simplify their browsing experience.
  • Users may also prefer not to user the fonts, font sizes, styles and color schemes selected by the web page designer and may apply their own CSS styling to their viewed version of the page.
  • The World Wide Web consortium (W3C) and web accessibility initiative (WAI) recommend that all web pages should designed with that criteria.


WEB SERVER:-

  • A computer program that is responsible for accepting HTTP requests from web clients, which are known as web browsers, and serving them HTTP responses along with optional data contents, which usually are web pages such as HTML documents and linked objects (images, etc.).
  • A computer that runs program described above is call web server. Web servers have also the capability of logging some detailed information about client requests and server responses to log files this allows the webmaster to collect statics by running log analyzers on log files.
  • Web server is able to handling static as well as dynamic contents compression of content and transfer.


INTRODUCTION TO WEB LANGUAGES

HTML [Hypertext Markup Language]:-

  • HTML stands for Hyper Text Markup Language. HTML provides instructions to web browser in order to control how documents are viewed and how they ate related to each other.
  • HTML develops a few years ago as a subset of SGML (standard generalized markup language) which is a higher level markup language. That has long been a favorite of the department of defense.
  • HTML is language interpreted by browser. Web pages are also called html document. Html is a set of special codes that can be embedded in text to add formatting and linking information.
  • HTML is specified as TAGS in html document.HTML allows the individual elements on the web to be brought together and presented as collection of text, images, multimedia and other files can all be packaged together using html. Its basic structure element is <html>, <head>, <title> and <body>.

Structure of HTML

<HTML>
    <HEAD>
    <TITLE></TITLE>
    <BODY>
    Any thing you write inside this body tag will be displayed on the browser.
    </BODY>
    </HEAD>
</HTML>


JAVA SCRIPT:
  • Java script is web scripting language. Java script is created by Netscape hence. Java script works best with Netscape client.
  • Java script can be embedded into html page that runs immediately on the client machine.
  • Java script's first name was "LIVE SCRIPT" but Netscape decide to exchange of java popularity and rename the product as java script, java script is object based language.
  • Java script is not a part of java language.

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