If ontology is going to provide the next generation of intelligent information management, more attention must be given to creating high-fidelity, truly semantic models that are capable of representing not only the electronic media that are used to store the information, music, graphics, etc. that people care about, but are also capable of representing the propositional content and the linguistic characteristics of those media.  The abstract propositional or musical contents of documents or recordings is often quite independent of the media on which it is encoded, or even the language used for the encoding.