[metadata] Provenance use case

Hi metadata-TF members, all,

When looking at Thierry's table [1], I was wondering about referring to the
PROV [2] spec, since the issue of provenance has not really come up yet.
To start discussion, I drafted a quick use case [3].

What are your opinions on this?

Regards,
Tom

[1] https://www.w3.org/dpub/IG/wiki/W3C_specs_for_DPUB
[2] http://www.w3.org/TR/prov-overview/
[3] https://www.w3.org/dpub/IG/wiki/Provenance_of_Digital_Publications