Are all Core 4 elements required?
No, it is not required that all elements be used in all records. The Core 4 metadata schema is extensive and detailed so a framework for complete and structured description is available, as needed. Elements, Sub-elements, and Attributes can be used as appropriate to the Collection, the Work, the Image, and user needs. These decisions are made locally. A Core 4 record can be minimal or extensive; only the ID attribute, which gives the Work, Image, or Collection record a unique identification, is required. 5.
