What are metadata standards?
Metadata standards are standardized schemas and serve the structured, uniform description of resources. Standards result in a "common language" and support the comprehensibility and interpretability of data as well as their interoperability.
A distinction can be made between different types of metadata standards. Accordingly, the standards have different uses and serve different purposes. There are standards for the description of the data structure and semantics (formats), the contents (sets of rules), the values (standard data, controlled vocabularies) and for communication (interfaces, protocols).