W.W.W
Wide Web World (The World Wide Web)Abbreviated name: WWW) and is, the Internet has been provided on the hypertext is a system. Also known as Web, Web, W3 (W3). The expression "Internet" may commonly refer to the World Wide Web.
As a slang term opposite to the above, the word web is used to describe the Internet itself. Web technology is not always used, such as web conferencing, but there are things that are held via the Internet.
In the World Wide Web documents (web page mainly to the description of) HTML and XHTML, such as hypertext of the description language is used.
Hypertext used on the World Wide Web is a system that allows documents scattered on the Internet to be referred to each other by embedding a reference to the URL of another document in the document (this is called a hyperlink ). is there.
The viewer can display the hyperlinked document by clicking or tapping the part with the hyperlink in the displayed document.
Such as Harimegurashi all over the world, who ties between the document spider from the fact that reminds of the nest, which means the spider's web spread to the world, " World Wide The web was named".
The spider web does not represent the actual cable wiring. Since the HTML description method is relatively simple, it has rapidly become widespread.
The software ( user agent ) for accessing the World Wide Web is called the WWW client. Of these, those intended for viewing by users are particularly called web browsers (WWW browsers, or simply browsers). The software that provides the services of the World Wide Web is called " WWW server software" or simply "webserver".
With the advent of portal search engines and web directories, the World Wide Web has gradually begun to show its true value. By putting into practice a method of ranking web pages based on mathematical theory, the top of the search engine was quickly established.
In contrast, creating a web directory that requires the collection of individual cases across all disciplines is similar to the compilation of dictionaries that can be accomplished through continuous and steady work.
In contrast, the former relies on mathematical methods, while the latter relies on taxonomic methods.
The idea of hypertext implemented by the World Wide Web has its origins in the Project Xanadu, and its specifications are also described as a reduced version of the Project Xanadu.
However, Web applications and cloud computing realized on the World Wide Web far exceed the idea of the previous generation hypertext system such as the Xanadu a project that assumes strict rule operation.
History
The World Wide Web has its origins around 1950 and was invented in 1989 by Tim Berners-Lee of the European Organization for Nuclear Research (CERN). The invention was implemented in the late 1990s, and the world's first web page was published on December 20, 1990.
After that, web pages were released one after another in each country, and it expanded explosively through the spread of viewers (web browsers) and protocol specifications and continues to the present day.
The World Wide Web differs from other hypertext systems in place at the time in several ways.
• The WWW uses unidirectional links rather than bidirectional links. This made it possible to link without having to contact the owner of any resource. This makes it easier to implement WWW servers and browsers, but at the same time, it also causes the problem of running out of linked resources.
• Unlike HyperCard and Gopher, the World Wide Web is not monopolized by any particular individual or organization and you are free to develop and extend your own servers and clients without the need for permission.
At the beginning of development, the WWW was relatively simple to handle character information (because it was developed on NeXT, the OS itself handles non-characters appropriately, so the WWW did not have to distinguish information. truth).
However, in 1992, the National Center for Supercomputing Applications (NCSA) at the University of Illinois made it possible to handle images as it is today. Marc Andreessen, a student at the school, has developed an innovative browser Mosaic that can handle not only characters but also images.
And with the free source code released to improve the software, Mosaic quickly became popular and the WWW became a global medium that anyone could easily use.
Social Impact
The Web has made it possible for individuals to exchange information on the largest scale in human history. Through the web, it has become possible to freely exchange a wide variety of information throughout the globe.
Emotional experiences, political thinking, cultural customs, musical customs, business advice, art, photography, literature, etc. are the cheapest digitized, shared, and disseminated in human history. The web is built on the technology and equipment that underpins it, but unlike printed matter, it has no physical shape.
Therefore, the transmission of information through the Web is not limited to the physical amount, and it does not take a lot of trouble to copy the information. Another advantage of using the Internet is that information on the Web can be searched easily and efficiently, and information can be gathered faster than any other means of communication ( mail, telephone, etc.) or physical travel.
In other words, the Web is the most widespread and distant personal information exchange medium that has ever appeared on the ground. Many users will exchange information with people around the world, enabling things that were not possible by other means.
Standard
There are three fundamental standards that make up the World Wide Web.
• A Uniform Resource Locator (URL) or Uniform Resource Identifier (URI) is a general-purpose system for referencing resources on the WWW, such as web pages.
• Hypertext Transfer Protocol (HTTP) specifies how the browser and server communicate.
• The Hypertext Markup Language (HTML) defines the structure and content of hypertext documents.
Berners-Lee is currently in a position to lead the W3C. W3C develops and maintains various standards, including the above, and strives to enable computers on the World Wide Web to store and exchange various forms of information.
