Part of BIBFRAME’s promise is that bibliographic descriptions move between systems on the web. The Library of Congress (LC) and the Blue Core project have been using the Concise Bounded Description (CBD) as their unit of description for BIBFRAME data. However, there is no shared, machine checkable definition of what a valid one looks like. In this talk we will describe what LC’s CBD is, and how it came to be. After a brief overview of how the CBD is used at the Library of Congress and in the Blue Core project we will describe some of the challenges involved with moving CBDs around between systems. We will close with a discussion of the significance of ongoing work to validate BIBFRAME using DC Tabular Application Profiles, SHACL and JSON Schema.
