Aligning definitions with 20151 Dataspace Concepts and Characteristics

[ssteinbuss]

          We should align this definition with the definition from the 20151 dataspaces concepts and characteristics:

'' governance framework and supporting services to build trustworthiness and enable the sharing of data through an agreed set of policies, semantic models, protocols and processes ''

Originally posted by @ssteinbuss in #113 (comment)

[ssteinbuss]

Add a note to this: that we just focus here on the protocol, for semantic models, processes and policies please look into 20151

[jimmarino]

@ssteinbuss is this still relevant?