Defining a list of subschemas and subsystems

In the -SS lines tab, you describe the subschemas that are used by a Logical View, and the subschemas and subsystems of a Table that is used by the Logical View.

Before you begin

Note:
  • A subschema is a set of Data Elements that belong to the composition of a Logical View or Table. The use of subschemas provides a partial view of this data. For example, a Logical View represents the American states. You can define a "telephone" subschema that groups the data that is related to the telephone coding (city number and area code).
  • A subsystem is a selection of Table items within a Table. Each is a different subset of data. You can define several subsystems in the -SS Lines tab of a Logical View. In the example, you can define two subsystems: a subsystem for the eastern states and another subsystem for the western states.

About this task

It is possible to define 10 subschemas for each Table or Logical View and 10 subsystems for each Table. The subsystems are identified by lines with a Y type and subschemas by lines with an S type. Both must be given a number and a name.

Procedure


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