tablib

There are two problems that reasonably explain the decision of only accepting public domain info: licensing and provenance. "Licensing" is hard. The "Open Specifications Promise" [1], which covers a bunch of Microsoft-designed file formats, is merely a covenant not to sue. "Provenance" is tricky. For example, much of the knowledge of the Apple iWork formats were derived by reverse-engineering the source programs and extracting protobuf definitions. Many open source projects have freely copied from each other, making detailed analysis tricky [2]. [1] https://en.wikipedia.org/wiki/Microsoft_Open_Specification_P... [2] https://github.com/jazzband/tablib/issues/114