Thus for every resource in the model (other than bf:Identifier, which should not have identity, as previously) there should be the possibility to give bf:identifier with an instance of bf:Identifier with the URI reified in bf:identifierValue, and the provenance description in other associated properties.
To make a couple of concrete examples:
1. We have a post-processing script that generates URIs and replaces the ones from the XQuery conversion utility. That post-processing script is versioned, and I found a bug in it recently. If we are going down the route of identifier provenance, then I could query to find all the URIs generated by that script.
2. As per Simeon's example, Stanford might mint a URI for me and Cornell might mint a URI for me. It might be interesting to know information about the assignment of those URIs... but they're not magical somehow, they're just URIs.
Currently both are supported by the model (bf:identifier's domain is bf:Resource, which has subclass of bf:Title).