Rational Programming Patterns

Logical View Definition tab

To define a Logical View, you must indicate the number of Logical View instances and the transfer direction between the client and the server.

To open a Logical View editor, click the Segment entity folder in a location within the Design Explorer view, and select a Logical View occurrence.
Note: All the data-entry fields included in the Logical View Definition tab are required.
Number of occurrences
The value entered in this field specifies the read or update iterative capacity of a server that calls this Logical View. This capacity is expressed by a maximum number of repetitions. The Logical View can then be used as a repeated structure. The maximum number is 999 occurrences.
Note: If the Logical View is not a repeated structure as a whole and if only a few of the Data Elements which constitute it belong to a repeated structure, it must be specified in the Data type field, in the -CE Lines tab. For more explanations, read the online help available on the -CE Lines tab in the Logical View editor.
Transfer direction
In a Logical View which is a repeated structure (previous field specified), it represents the transfer direction between the client and the server:
Table 1. Specification of the transfer direction
Options Comments
Both directions Default value for an update service or a selection service. It is the required value for graphic applications.
C: Client to Server Client to Business Component: From the Logical View to the Segment for an update service.
S: Server to Client Business Component to client: From the Segment to the Logical View for a selection service.
Note: You only select C or S if all the Data Elements have the same transfer direction. Otherwise specify it in the -CE Lines tab of the Logical View editor.

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