Some vocabularies used (or which could be used) for stock record attributes and coded value maps in Evergreen are published on the web using SKOS. The record attributes system can now associate Linked Data URIs with specific attribute values. In particular, seed data supplying URIs for the RDA Content Type, Media Type, and Carrier Type has been added.
This is an experimental, "under-the-hood" feature that will be built upon in subsequent releases.