World Wide Web(www,Web)

introduction

The world wide Web (also made "network", "WWW", "3W", "Web"), is a material space. In this space: as useful things, called as "resource", And by a whole domain "unified resource identifier" (URL) logo. These resources through Hypertext Transfer Protocol (Hypertext Transfer Protocol) for the users', while the latter by clicking on the link to obtain resources. From another perspective, the world wide web is a network access through the interconnection hypertext (hypertext interlinked document) system. The World Wide Web Consortium World Wide Web Consortium (W3C), abbreviation, say again W3C council. In October 1994 with "world polytechnic university in the most" title of the Massachusetts institute of technology (MIT) computer science laboratory was established. A builder is the world wide web inventor Tim berners-lee.

The world wide web is often as Internet synonyms, but actually it is by Internet web run a service.

brief

The earliest conception of network can be traced back to the distant 1980 Tim Bernard, lee of constructing ENQUIRE project. This is a similar wikipedia online editing of hypertext database. Although this and we use now the world wide web is very different, but they have many of the same core ideas, even also include some Bernard, lee web after the next project semantic web of conception.

In march, 1989, "kenaz lee wrote" about information management proposal "penny, this paper mentioned ENQUIRE and describes a more exquisite management model. In November 1990 12 he and Robert Cailliau cooperation proposed a more formal about a world wide web advice. In 1990 November 13 him in a NeXT workstation wrote the first web page to fulfill his paper ideas.

In that year of Christmas vacation, Bernard, li made to a network which work must all of the tools [6] : the first world wide web browser (also editor) and the first web server.

In 1991, August 6, he in Alt. Hypertext newsgroups sticked a web project profile articles. The day is also marks the Internet web public service's first appearance.

The world wide web is of vital important concept hypertext originated in the 1960s in several formerly of the project. Such as Ted Nelson of Douglas Engelbart Xanadu and bought NLS. But these two projects inspiration came from WanNi anwar · bush in its 1945's thesis of "and we think the way for microfilming in" design "memory extension" (memex) system.

Tim berners-lee another brilliant breakthroughs are hypertext grafting on the Internet. In his book, the network ", weave he explained he once again and again to the two technologies users suggested they combination is feasible, but no one response to his advice, he finally had to solve the plan. He invented a global network resources unique authentication system: uniform resource identifier.

The world wide web and other hypertext system differences

The world wide web need single links rather than two-way connection, this makes anyone can in resource owners do not make any action links the resource situations. And early network system, compared to this point to reduce realize a web server and a web browser is vital, but the difficulty of its side effect is produced bad chain of chronic problems.

The world wide web is not like some applications such as HyperCard, it not private, which makes the server and the client can be independently develop and expand, and do not get permission limit.

In 1993, April 30, the European organization for nuclear research announced the world wide web, not open anyone for free of charge. Two months after the Gopher announced that it would no longer free and caused a lot of users from Gopher steering the world wide web. The World Wide Web Consortium World Wide Web Consortium (W3C), abbreviation, say again W3C council. In October 1994 in MIT computer science laboratory was established. A builder is the world wide web inventor Tim berners-lee.

Since the 1940s people dream to have a worldwide information base. In this database data can be not only global people access, and should be able to easily links other local information, so that users can quickly get vital information. It causes the fifth information revolution.

Along with the rapid development of scientific technology, people of this dream has come true. Currently in use of the most popular system is called "universal information net World Wide Web (WWW"). It is defined officially "WWW is a hypermedia information retrieval area wide - initiative to universal access to a picture of documents about universe." in short, WWW is an Internet based computer network, it allows users in computer via Internet access information on another computer. From technical Angle, says the global information net is Internet on those who support the WWW agreement and hypertext transfer Protocol (HTTP Protocol) Transport Hyper sites, the client and the server collection through it may access the world of hypermedia files, content including Text, graphics, audio, animation, databases, and a wide variety of software.

Theoretically speaking, the global information network includes the whole 200 million people above the Internet world, it contains all the Web site, Gopher XinXiZhan, FTP archive, Telnet public access account, News press discussion area and Wais database. So global information network can say today is the World's largest electronic data World, already can put the World Wide Web as synonymous with the Internet. In fact, we typically daily said that "on the Internet," actually refers to the World Wide Web is connected. World Wide Web (WWW is the abbreviation of global information network), can also referred to as the Web, Chinese name for "Web".

The world wide web - basic terminology

Hypertext (Hypertext) is called by a Web browser (Web) of the program shows is clicked. Web browser from web server to retrieve called "document" or the "web" information and displayed. Usually displayed on the computer display. People can follow on the homepage hyperlinks (distribute), then retrieve files, even can also send data to the server. Follow hyperlinks walk behavior and call to browse the web. The relevant data usually formed a group of web pages, also called website.

"Surfing the Internet browsing the network", namely, the first by a call Jean Armour Polly writer through his work "surfing on this concept was incorrect. This book by Wilson press in June 1992 officially publishing. She may be put forward this concept of independence, but in earlier 1991 to 1992 years in Usenet is used by someone. Somebody remembers in these two years before they have some hackers using the word. Pauli in Internet field are sometimes referred to as "network mom" (NetMom).

Although English word number is usually written in one word (no Spaces or hyphens), full World Wide Web and its abbreviation WWW now in some regular in English were also widely used. The earliest literature about the World Wide Web called it WorldWideWeb (this is a programming people like conjunction word, namely a few words together into a new word perfect example) or World Wide Web - (hyphens, so this version of the name closest to the formal English usage).

composition

client

The client is a need of something, and if the server program is to provide certain things program. A client can request to many different servers. A server can also to many different client services are provided. Typically, a client and a server startup dialogue. The server is usually wait for client's representation of an automatic procedure. Client usually as a user request or similar to the users of each procedure request and run. Agreement client request server and server response request how various methods defined. WWW client can also be called as the browser.

Usually the global information Internet client mainly includes: IE, Firefox, safia, opera, etc.

In Web, client task is:

1. Help you make a request (usually in click a link point start).

2. Will your request to send to a server.

3. Through direct images appropriate decoding, submit an HTML document and transfer various documents to the corresponding "observation device" (that), the request results report to you.

An observation device is a can be WWW client calls and presents specific types of document procedure. When a sound files by your WWW client access and download, it can only use certain programs (such as Windows media player "under") to "observation".

Usually the WWW Web server client not only limited to request can also to other server (for example, file transfer protocol (FTP, news, Gopher E-mail) request.

server

Accepts requests. 1.

2. Request the legitimacy of the examination, including safety shielding.

3. According to request access and production data, including Java script and procedures, CGI scripts and procedures, for file Settings properly MIME types of data made a previous processing and processed.

4 the effectiveness of the audit information.

5 send data to the client request.