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
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.
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.
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.
To remove a line from the list, select a line and click Remove.
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.