Rational Programming Patterns

Defining a list of subschemas/subsystems

The In the -SS lines tab you describe the list of the subschemas used by a Logical View and the subschemas and subsystems of a Table used by the current 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, you have a Logical View that represents the American states. You can define a "telephone" subschema that groups the data related to the telephone coding (city number and area code.
  • A subsystem is a selection of Table items within a Table, each one being a different subset of data. You can define subsystems only if you use Pactables. In this case, you can define several subsystems in the SS lines of a Logical View. In our example, you have two subsystems that represent the 'eastern' states and the 'western' states.

About this task

It is possible to define 10 subschemas for each Table/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

  1. To add a new subschema in the list of the SS lines, click the Add a subschema line button (or select this action in the contextual menu). As a result, an S type line is added to the list of SS lines.
  2. To create a subsystem, in the list of the SS lines, click Add a subsystem line. The button is active only if you use Pactables. Then, a Y type line is added to the list.
  3. When you create a subschema or subsystem, a Definition section opens up. You can then define the characteristics of the new subschema or subsystem such as its name and number. For subsystems, you must specify the maximum number of occurrences. The name and number of the new subschema or subsystem are automatically displayed on the corresponding line in the list.
  4. To remove a line from the list, select a line and click Remove.
  5. To sort the SS lines in the list, select a line and click one of the direction buttons
    Note: The possible actions with the buttons are also available in the contextual menu of the table.

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