Machine-actionable metadata refers to metadata that is structured in a way that makes it easily processable by computer programs. It is metadata that is designed to support automated processing, interpretation, and reuse by machines and applications.

Machine-actionable metadata typically consists of standardized data elements and formats, organized according to a well-defined schema or metadata model. This enables software applications to automatically discover, analyze, and interpret the metadata, and to use it to perform a range of tasks, such as data integration, information retrieval, and knowledge discovery.