The Charleston Advisor has an interview with Herbert Van de Sompel, the creator of OpenURL/SFX. [via ShelfLife, via FOS]
The crucial importance of [DOI/CrossRef] is in the mere fact that objects are being identified, and that identifiers can lead to metadata about objects. ... We could start seeing new generation OpenURLs for cars, real estate, music, pizzas, and domain-specific linking servers that deliver overlay services.
Such as http://www.example.com/search?artist=nirvana&album=nevermind&track=in%20bloom