http://www.libraryjournal.c... In the library world, OCLC controls the flow of information. A non-profit organization, it is the center hub for libraries all over the world to share information and loan books to each other. Think of it as a tollway for books. When a Marc / metadata record is created (contains information like author, subject, copyright date, etc) libraries will upload that information to OCLC. This Marc record will ......