Office software is closely linked to the PDF,the PDF is also must have to control!
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4 copyright issues PDF document as a result of easy transmission, and in obtaining a free reading software can be free to browse to the PDF format of the copyright-protected electronic books posed a great challenge. In response to this problem, Adobe has introduced a publishers and distributors for the security of the publication system. The system is composed of two parts: Adobe PDF Merchant and Acrobat Reader's Web Buy plug-ins. PDF Merchant is a server-side procedures, Web Buy plug-ins as a client through the two to work to ensure that online publications from piracy. PDF Merchant for the PDF document ready to send additional "lock", when the reader tried to use Acrobat Reader to read on the "lock" the document will see that you have no right to a reading of the information content of the document and asked whether you want to buy the contents of the paper after you click to buy, PDFMerchant will be taken directly to your publisher or distributor of the site to complete the purchase, the site will tie in with the Acrobat Reader to read the contents of the documents and permission to send on your computer. Of course, the system only for publishers and distributors, and libraries on how to protect their own interests, blocking piracy loophole, there is no off-the-shelf solutions, but the security system provided us with ideas. Libraries can also be modeled on its way to PDF format for electronic books plus "locked", when users download and read, require users to input relevant information (such as library card number, etc.) and promised not to book for commercial use, and then only to the content displayed. 5 Conclusion PDF documents in the electronic document distribution and digital transmission is not popular by accident, but a series of advantages as part of its backing. With the Internet, more and more the appearance of PDF documents, and its scope are no longer limited to e-books, a number of product descriptions, e-newspapers and periodicals, the company advertising, network information and e-mail have been made into PDF files, so this library should be I give full attention to new things, to incorporate it into their own system of information resources to explore its collection, organization, management and use of ways and means to better services for readers. |
