ENABLE Reference Manual

RUNNING ENABLE

ENABLE Commands--Usage Overview

The following paragraphs discuss using the ENABLE commands.

Generally, you use these commands to:

• Describe an object

• Add the object to the object table

• Generate an application

Suppose, for example, that you want to generate an application

that can access a data base file named "parts." To do this, you:

1. Describe a box that is to represent this file

2. Name the box (for example, "parts-box") and add it to the

object table

3. Describe the application that is to use the box

4. Name the application (for example, "parts-in") and add it to

the object table

5. Generate the application

Describing an Object

To describe an object, you supply values for the attributes that

define the characteristics of that object. ENABLE stores these

attribute values in an internal table called the attribute table.

This table contains:

• The starting value of each attribute (a value that the

attribute has when you start ENABLE)

• The current value of each attribute (a value that you supply

with a SET command)

• The override value of the attribute (a temporary value that

you supply with an ADD command)

• The default value, if any, of the attribute (a value that

ENABLE supplies for certain attributes if the starting value

is null and you have not supplied a current or override

value)

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