Rational Programming Patterns for System z

Defining a list of subschemas/subsystems

The -SS lines tab is used to 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 which 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 which 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 which 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 a '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 and button. As a result, a '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 displays in the right part of the list so that you can define the characteristics of the new subschema or subsystem such as its name and number, and 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 in the list, select a line and click Remove.
  5. To sort the SS lines in the list, select a line and click the ↑ to move up a line in the list or ↓ to move down a line in the list.

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