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. differential data backup for effectively backup data storage in a reliable format and space saving way df sdk is a software development kit to serve you effective approach of making and updating software patches and integration of the patch building or applying process into your software products and information technology enable services. by using df development kit you can effectively accomplish the following job such as: - software updating or patching to ensure precedence and significance of your end-users and they always have updated or new version of your existing 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 creates differences for updating the target file on the end-user system. df sdk comes with sample programs and it includes examples which can simplify do patch creation and applying process. the size of your files, database or document does not matter but only difference between versions do. 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. 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.