All objects stored in the database as well as the relationships between these objects are stored in the so-called database catalog. ADABAS provides different ways to retrieve information from the catalog.
On the one hand, there is DOMAIN which can be used to create and maintain objects in addition to making queries to the catalog. On the other hand, information about the objects is stored in various system tables which can be accessed in the usual way by using SELECT statements. Owner of these tables is the special user 'domain'.
Since the number of system tables and relationships represented in these tables is very large, we show a few important queries in the following sections. The exact structure of the system tables is contained in the Reference manual.