clarify text definition of locality description

[cmungall]

"An information artifact that is about a spatio-temporal region at which a process (such as collecting process, observing process, or material sampling process) occured[sic]."

comment: Darwin Core needs to describe both the site and time where some activity occurred as an information content entity (e.g., in recording data from a lab notebook),therefore, we made locality description about a spatial temporal region, rather than a site.

It would be useful to accompany this with some logical axioms. Would this be SubClassOf is about some 'spatiotemporal region'?

It would be good to provide some examples of how this would be used - I don't think SRs are typically named (there is an argument that GAZ actually represents SRs), so it's likely you will want to project onto a process or an independent continuant via an inverted occurs_in relation, e.g

:obs1 a bco:LocalityObservation ;
          iao:is_about :sr1 .
:process1 ro:occurs_in :sr1
<info on process1>