Inside the LibrarySchema Package

All the classes we define are part of the LibrarySchema package.

Double-click the package symbol in the logical view to open a window to display and define classes. Initially the classes window is empty.

The Class tool in the toolbox creates a class symbol for

• a new class in this package
• an existing class in any package

Instructions

1. Double-click the LibrarySchema package in the Main diagram of the logical view. A Classes window for LibrarySchema is opened.
2. Select the Class tool in the toolbox and click anywhere in the Classes window. A new class symbol is created.
3. Overtype the name for the new class NewClass as Book. Click outside the new class symbol.
4. Double-click the Book class symbol. The Class Specification dialog is displayed.
5. Complete the Class Specification dialog and click the OK button.

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