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DF SDK is a Software development kit to provide effective approach of creating software patches, updates and integrating of the patch applying or building process directly into your own useful software products and IT enable services. Differential data backup for effectively backup data storage in a reliable format and space saving way. Version control for reliable and efficient control under versions of your any type of files. By using DF SDK you can effectively accomplish the following tasks such as: - Software updating or patching to ensure priority and significance of your end-users and they always have the latest version of your software product. Like other available products, DF SDK does not only simply create incremental updates and re-package files, but analyzes each file at the byte level and builds the difference for updating the target file on the end-user system also. DF SDK does not deal with any specific data structure but it operates with files as a binary data and thus designed to work well on files of any type including executables, libraries, data files and others Available as a standard dynamic link library (DLL), DF SDK can be used almost with every Windows development language. DF SDK can be used to build a compact byte-level difference for two binary files with the following reconstruction of the new version files using an old single file or the bunch and the result different file on the target machine. The DF SDK API is designed to be simple enough to integrate it into your existing products, solutions and to provide a high-grade of performance and flexibility. The size of your files, database or document does not matter but only difference between versions do. DF SDK comes with sample programs and it includes examples which can simplify do patch creation and applying process.