I received this information (unsolicited) from Bruce Kirchoff (with whom I have been collaborating for a number of years) regarding his collection of images from trees in the UNC Greensboro arboretum for use in visual keys:
We have got 26 trees recorded with complete sets of images, and herbarium specimens collected in duplicate. One set of specimens will go to Chapel Hill, the other will stay here for teaching purposes.
In this case, we have images, herbarium specimens duplicates in two institutions, and the living specimens in the arboretum (the foo that defines itself) that we want to organize under the banner of Individual. I will be archiving Bruce's images at Bioimages and elsewhere using HTTP URI guids. I will be representing the relationship among these resources in RDF. So expect to see functional examples using real resources in the near future.
Steve