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PDF文件格式(国外英文资料)
PDF文件格式(国外英文资料)
Design and implementation of object oriented Chinese PDF reader
Yangdaoliang
This paper introduces the object-oriented Chinese PDF (Portable Document Format) principle and Realization of reader design. Firstly, this paper introduces PDF and points out the necessity of the development of Chinese PDF reader. Secondly, the paper introduces the architecture of PDF and puts forward the design scheme and Realization of the reader.
Keywords object oriented, PDF reader, OOA, OOD
THE DESIGN AND IMPLEMENTATION
OF AN OBJECT-ORIENTED CHINESE PDF READER
Yang Daoliang
Inst. of Computer Sci. Tech., Beijing Univ., National Key Laboratory for Text Processing, Beijing 100871
Abstract This paper introduces the design and implementation of an object-oriented Chinese PDF reader. First, we give a brief introduction to PDF (Portable Document Format), and point out the problems existing in Adobe Acrobat Reader while dealing with Chinese Characters. Then we analyze the structure of PDF and according, to this, we put forward the design of an object-oriented Chinese PDF reader.
Keywords Object-Oriented, Portable document format (PDF), Reader, Object-Oriented analysis, Object-Oriented design.
1 Introduction
Structured document format PDF (Portable Document Format) is first proposed by the United States typesetting and image processing software company Adobe in 1993. It from the page description language PS (PostScript) development, has almost the same with the PS page description ability and similar description method. But unlike PS, PDF can describe the complex layout, also has interactive features (such as hyperlinks, interactive form etc.), random access page and font simulation described. Therefore, PDF is not only suitable for printing, but also suitable for electronic publishing. PDF compared with the dominant in electronic publishing HTML language also has its own advantages. HTML cannot describe the layout, and PDF can describe the exquisite layout; the inconsistency o
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