Metadata is data about data. In metadata, you can find information about spatial data sets and services, compliance of spatial data with prescribed norms, conditions of access and use of spatial data sets and services, quality and up-to-dateness of spatial data sets. Metadata in the metadata Catalog provide information about bodies, organizations, public enterprises or legal entities responsible for the establishment, maintenance, access, exchange and use of spatial data sets and services, and spatial data sets to which access is restricted and the reasons for restrictions.