Tabular Data Package
This page describes Tabular Data Package, formerly known as Simple Data Format (but not related to Simple Data format by George H. Fisher). It is described as a "simple data publishing format for publishing and sharing data". It is created by the Data Protocols Team (in 2011?), whose manifesto is at http://dataprotocols.org/manifesto/. This does not however identify the Data Protocols Team or its affiliations.
The draft specification is at http://dataprotocols.org/tabular-data-package/. The format's focus is simplicity and web usage. It is based on CSV for the base data and JSON for schema, metadata and lined data aspects.
There is no known Wikipedia page for the Data Protocols Team or this version of the Tabular Data Package.
The file extension and MIME Type are not known.
Apart from the manifesto and specification, nothing is known.