PROV-ISSUE-342 (location-of-usage): prov:location is an optional attribute of entity and activity - others okay? [prov-dm]

PROV-ISSUE-342 (location-of-usage): prov:location is an optional attribute of entity and activity - others okay? [prov-dm]

http://www.w3.org/2011/prov/track/issues/342

Raised by: Timothy Lebo
On product: prov-dm

4.7.4.2 prov:location

states:

"The attribute prov:location is an optional attribute of entity and activity. "

does this imply that it is NOT an attribute of any other class?

I imagine that it might be useful to specify the location of a usage, which would be more specific than the location of the using activity. e.g., "The party happened at Sarah's. The cake was cut with a knife in the kitchen." To mention "kitchen" for the usage, prov:location seems natural.

Is it acceptable to view the DM's current statement as non-restrictive?

Thanks,
Tim