Office software is closely linked to the PDF,the PDF is also must have to control!
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1.2 PDF and html comparison html is SGML (Standard Generalized Markup Language) of an application, is the internet's leading form of information dissemination. It can describe the style of the basic web page with illustrations and interactive and ultra-connectivity with the Java or the script to have some processing capability, can also interact with the server through cgi. PDF is also the same with the html form and hyperlink cross-functional, suitable for on-line dissemination of information. However, with the html is different PDF also has the ability to describe the layout attractive. PDF printing and paper to achieve a unification of electronic publishing. After publishing the contents of save as PDF files, you can at the same time in the delivery of the printing, distribution network (need to increase the appropriate interactive content), rather than as a number of current practices, the need for two teams of officers, a group of printing for the paper for publishing generated PS, the other group for the electronic publishing html document creation, resulting in a waste of resources and manpower, production inefficiencies. html In addition to the ability not to describe the layout, but also often inconsistent information (such as the different platforms, different browsers, different sizes of the browser window to see the same web page showing a different way). PDF has been in very good solution to this problem. 1.3 PDF of the characteristics of PDF characteristics are summarized as follows: Transitivity. PDF file support 7 Ascii code and binary code in two ways, you can correct in a variety of network transmission environment. Platform independence. PDF files with software and hardware platform independence. Users in different circumstances (such as operating systems in different languages, different hardware platform) to see the PDF file format and content are complete with the author at the time of writing exactly the same situation. This feature is very suitable for information exchange, from the anguish garbled. Font independence. PDF documents can bring their own description of the font or font information in the user's system fonts in the absence of the necessary circumstances, can still display correctly. Supports a wide range of compression, encoding, file more compact. Compression, coding style: Asciihex, ¢A scii85, lzw, runLength, ccitt group3, ccitt group 4, jpeg, flate. Support interoperability. Interactive form and can contain hyperlinks. Support voice, animation. Support random access to the page. Additional changes to support the continuous mode for a small number of changes to improve efficiency. Security control. Supports a variety of different levels of security, such as read only and can not print and select text; can read, can print, but can not be changed; can read, print, and so on can be modified. This security control to protect the copyright of electronic publications is very important. |
