Creating Dataviews for Sequential Files › Defining Modeled Sequential Files › Data Structures

Data Structures

This section describes the data administration functions of the CA Ideal user. It assumes some familiarity with the Datadictionary. It explains how to establish and maintain modeled dataview definitions for sequential files that CA Ideal uses. See the CA Datacom/DB documentation for a full explanation of terms and use.

Since dataview definitions are stored in Datadictionary, your DA should establish and maintain them using Datadictionary. Step by step instructions on defining a Datadictionary are provided in the section titled Defining Modeled Dataviews for Sequential Files in this chapter. However, to be sure you are creating a valid dataview for CA Ideal; you should familiarize yourself with the rules that CA Ideal enforces when cataloging a dataview before defining the dataview in the dictionary.

The functions of a Data Administrator include:

• Defining the file layout in the dictionary, including establishing fields.
• Defining elements of the record in the dictionary. An element is a group of one or more contiguous fields in a record.
• Defining dataview definition occurrences in the dictionary facility.

Access Datadictionary Online by selecting option 3 on the Administration Maintenance Menu or by issuing the CA Ideal command:

DDOL

At any time during the use of DDOL, the DA can return to the CA Ideal Main Menu by issuing the DDOL command:

IDEAL

The following graphic illustrates the entity types and relationships in the dictionary and their relationship to CA Ideal. In this graphic, the unshaded area represents the file model, and the shaded area represents the application model.

Notice that the file model for a sequential file is different from the model for an CA Datacom/DB table. The AREA and TABLE are replaced by a FILE and a RECORD and no DATABASE is specified.