The purpose of designing PDF file format by Adobe Company is to support cross-platform and multimedia integrated information publishing, especially for network information publishing. In order to achieve this goal, PDF has many incomparable advantages over other electronic document formats. PDF file format can encapsulate text, font, format, color, graphics and images in one file independent of device and resolution. Format files can also contain hypertext links, sounds, dynamic images and other electronic information, support super-long files, and are highly integrated, safe and reliable.
PDF files use industry standard compression algorithms, which are usually smaller than PostScript files and easier to transmit and store. It is also page independent. A PDF file contains one or more "pages", which can handle each page independently, especially suitable for multiprocessor systems. In addition, a PDF file also contains the PDF version used in the file and the positioning information of some important structures in the file. It is precisely because of its various advantages that PDF files have gradually become the new favorite of the publishing industry.
For ordinary readers, e-books made of PDF have the texture and reading effect of paper books, which can "realistically" show the original appearance of the original book, and the display size can be adjusted at will, providing readers with personalized reading methods. Because PDF files can be independent of the language, fonts and display devices of the operating system, it is very convenient to read.
These advantages enable readers to quickly adapt to electronic reading and online reading, which is undoubtedly conducive to the popularization of computers and networks in daily life. Most popular e-books are in PDF format. For example, the popular electronic version of Jin Yong's works on the market is in PDF format.
Adobe Company takes PDF file technology as the core, providing a complete set of electronic and network publishing solutions, including commercial software Acrobat for generating and reading PDF files and Illustrator for editing and making PDF files.
Adobe also provides font packages for reading and printing Asian characters, namely Chinese, Japanese and Korean characters.
At present, there are generally three methods to make PDF files:
Application conversion tools are generated by files in other formats (such as DOC, HTML, etc. ).
Convert from a file containing Postscript page description language.
Make it directly with a specific application (for example, Illustrator8.0).
First, generate PDF files from files in other formats.
Adobe's Acrobat4.0 is a software development package, which integrates Postscript and PDF related tools, including PDFWriter, Acrobat Distiller, Acrobat EXCHANE, Acrobat Catalog, Acrobat Capture plug-in, Acrobat Scan, Postscript printer driver and other software needed to generate PDF files. Acrobat4.0 can be downloaded from http://www.adobe.com, Adobe's homepage, but it is a commercial product.