Informix is a database management system (DBMS) produced by IBM. ArcSDE geodatabases in an Informix DBMS store their spatial data in the Informix Spatial DataBlade data types.
Geodatabases stored in an Informix DBMS have system tables, which are created and maintained in the schema of the ArcSDE administrator. These system tables maintain information about and manage the data in the geodatabase.
Geodatabases stored in Informix also contain user-defined datasets such as feature classes and raster catalogs. These tables store the spatial and attribute information of your GIS data. They are stored in the schema of the user who creates them. User-defined datasets should not be stored in the ArcSDE administrator's schema; therefore, you should use another user name to connect to the geodatabase when you are creating datasets.
The following topics describe both the user-defined and system tables found in a geodatabase in Informix.
