I’m a couple of weeks late in pointing this out, but Mark Lindner posted Can Something Be Abstract and Not Have the Property of Being Abstract? on his blog on 9 January 2007, commenting on the Renear and Choi paper that’s been mentioned here a few times now. In the comments, Lindner says that FRBR should be implementable and not just theoretical, and that “Renear and Choi are trying to help make FRBR just that. Allen Renear is one of the biggest supporters of FRBR that we have at UIUC. He does guest lectures in most any class that talks about it. And he leaves out (most of) the high minded philosophical abstractions when he does.”
I linked to Lindner’s blog late last year (see Theoretical Topics in FRBR) because he blogged about a conference session of that title that included Renear and Choi.