User-Defined Metadata

From SRB

User-defined metadata is information about SRB data objects that users can establish. In addition to the built-in System Metadata, users can set up and query user-defined metadata as attribute-value-unit triplets (accessible via the Sufmeta Scommand). The Extensible Schema is another way in which users can define and use metadata specific to their application. Also see the FAQ item, What is application level meta data?.