Logical data areas
A logical data area is used to define a logical data structure made up of classes and data views.
A logical data domain is owned by a package and references objects held in other packages.
You can define the access mode (creation, deletion, etc.) to the objects referenced by a data area by integrating them as components of the data area.
During integration with HOPEX Database Builder, a corresponding physical structure can be defined via a physical data area. It is made up of tables and table views.
Creating a logical data area
To create a logical data area:
1. Click on the navigation menu, then on Logical Data.
2. In the navigation pane, click All logical data areas.
The list of logical data areas appears.
3. Click the New button.
The creation dialog box opens.
4. Enter the name of the data area.
5. If appropriate, enter the package owner.
6. Click OK.
The data area appears in the list.
The Data Area Diagram
A data area diagram defines classes and their relationships in a Whole/Part formalism in connection with the subject of the data area (logical or physical) described.
You can connect one or more data area diagrams to a logical data area, according to what you want to describe.
The structure of a data area must be explicitly stated via the creation of its components (classes or class views) See
"Creating a component".
Creating a data area diagram
To create a data area diagram from a logical data area:
Right-click on the logical data area and select
New >
Data Area Diagram.
Adding an object
In the data area diagram, you can add a new object or connect an existing object.
Adding a class
To add a new class to a diagram:
1. In the diagram insert toolbar, click Class, then click in the diagram.
The Add A Class dialog box appears.
2. Enter the name of the class and click Add.
Add a data view
To add a new data view to a diagram:
1. In the diagram insert toolbar, click Data View, then click in the diagram.
The Add Data View dialog box appears.
2. Enter the name of the data view and click Add.
Creating a component
To define the structure of a logical data area, you must specify its components (classes or class views)
You can create a component from an object in the diagram or in the properties window of the data area.
To create a component from an object of the data area diagram:
In the diagram, right-click the object in question and select
Add to (name of the data area).
The name of the component created appears in the properties of the data area. By default it has the name of the object that it references.
Defining object access mode
On the component, you can define the access mode to the object referenced (creation, read-only, deletion, etc.).
To define the access mode to the object in the data area:
1. Open the properties data domain.
2. Click the drop-down list then Components.
The list of components of the data area appears.
3. Select the component.
4. For each column (Creation, Read-only, etc.), select the corresponding check box.