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PDFNet is a high-quality, industry-strength PDF library meeting requirements of the most demanding and diverse applications. Using PDFNet you can write stand-alone, cross-platform and reliable commercial applications able to read, write, and edit PDF documents.
PDFNet is offered on a wide range of platforms (Windows, Mac OS X, Linux, Android, iOS, WinRT, Windows Phone, etc.) and programming environments (C/C++, C#, VB.Net, Java, Python, Ruby, PHP, and Objective-C).
The PDFNet API is divided into multiple namespaces. The most important are the PDF, SDF, and Filters namespaces.
The PDF API is a simple, high-level API for manipulating PDF constructs such as pages, interactive forms, bookmarks, graphical elements on the page, and so on.
The SDF API is a powerful, low-level API for manipulating every aspect of a PDF document. To use the SDF API, you must be familiar with PDF file structure (documented in the PDF Reference Manual). Using the SDF API, it is possible to implement functionality not present in the PDF API.
The Filters API deals with various compression and encryption schemes used in PDF documents. Unless planning to implement a custom encryption or compression scheme in PDF documents, you need only very basic knowledge of the Filters API.