Database Catalog 

The database catalog of a database instance consists of metadata in which definitions of database objects such as Basis tables, view tables, synonyms, value ranges, indexes, users, and user groups are stored.

The database catalog is made up of a number of sections. One section consists of the information about the installation of the database system and the metadata with the definitions of users and user groups. This section is not assigned to any user or user group.

For each user or user group, the catalog contains a section in which the metadata of the objects generated by this user or user group is stored. This includes metadata on Basis tables, view tables, and so on.

A user can only access the metadata of another user or another user group if authorized to do so.