There are some good ideas in this document. Locally working software is a good idea. But, I think that it is better to not use formats and protocols that are to

There are some good ideas in this document. Locally working software is a good idea. But, I think that it is better to not use formats and protocols that are too complicated. Furthermore, you are not necessarily limited to only one protocol, nor necessarily one file format. Multiple implementations are also possible; someone can make a separate implementation for a different computer system, too, according to their own preferences.