Let's look at two nouns first:
1、 Hypertext
A global information structure that links different parts of a document through keywords, enabling information to be searched interactively. It is short for hypertext.
2、 Hypermedia
Hypermedia is the combination of hypertext and multimedia in the information browsing environment. It is short for hypermedia. Users can not only jump from one text to another, but also activate a sound, display a graph, and even play an animation.
The Internet uses hypertext and hypermedia to organize information, extending the links of information to the entire Internet. The Web is a hypertext information system. One of the main concepts of the Web is hypertext connection, which makes the text no longer as fixed and linear as a book. Instead, you can jump from one location to another. You can get more information from it. You can turn to other topics. If you want to know the content of a topic, just click on the topic to jump to the document containing the topic. It is this multi connectivity that we call the Web.
Web features:
1、 The Web is graphical and easy to navigate
One of the most important reasons why the Web is very popular is that it can display colorful graphics and text on one page at the same time. Before the Web, information on the Internet was in text only. The Web can provide the feature of integrating graphics, audio and video information. At the same time, the Web is very easy to navigate. Just jump from one connection to another, and you can browse between pages and sites.
2、 Web is platform independent
No matter what your system platform is, you can access WWW through the Internet. There are no restrictions on your system platform when browsing WWW. We can access WWW from Windows, UNIX, Macintosh and other platforms. Access to WWW is achieved through a software called browser. Such as Netscape Navigator, NCSA Mosaic, Microsoft Explorer, etc.
3、 The Web is distributed
A large amount of graphics, audio and video information will occupy a considerable amount of disk space, and we cannot even predict the amount of information. For the Web, it is not necessary to put all the information together. The information can be placed on different sites. Just indicate the site in the browser. It makes the information that is not necessarily in one site logically integrated. From the user's perspective, the information is integrated.
The Web is dynamic
Finally, since the information of each Web site contains the information of the site itself, the information provider can often update the information on the site. Such as the development of an agreement, the company's advertising, etc. Generally, all information sites try to ensure the timeliness of information. So the information on the Web site is dynamic. Frequently updated. This is guaranteed by the information provider.
The dynamic nature of the Web also shows that the Web is interactive.
The interactivity of the Web is first manifested in its hyperlinks, and the user's browsing order and the site he goes to are completely determined by himself. In addition, dynamic information can be obtained from the server in the form of FORM. The user can submit a request to the server by filling in the FORM, and the server can return the corresponding information according to the user's request.
What kind of work do web engineers do?
A - Cooperate with artists to form a specific design that conforms to the Web Page
B - Have the ability to quickly produce layered high-quality PSD and PNG
C - It can quickly conceive the contents of PSD and PNG into HTML codes such as div+css or table
Flash Design a - basic animation effect b - complex interaction system design, understand the third-party swf aided design software c - complex interaction system design and strong ability to integrate various external resources (PNG, JPG, MP3, WAV, etc.).
