F+S08(a-d): need clearer definitions

[daniwelter]

The description of the overall indicator (F+S08) seems to make a distinction between structured metadata and machine-readable metadata without clarifying what is meant by this (this whole point of structuring metadata is to make it machine readable). It also talks about common vocabularies. Neither concept (structured metadata or vocabularies) are revisited in the sub-indicators. This should be clarified.

There is a lot of overlap between indicator a, b and c. In particular, data processing and analyses methods are generally considered to be experimental protocols and should therefore be covered under indicator a. If indicator a is intended to only focus on sample collection and sample processing (in vivo/vitro) steps of a study while c focuses on the in silico aspects, this needs to be clarified