Zen QuickStart Tutorial
Data Model
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The Caché data model for Zen Contacts consists of three classes ZenTutorial.Contact, ZenTutorial.Address, and ZenTutorial.PhoneNumber. The classes store information about contacts and their phone numbers. Here is a diagram depicting the two classes:

ZenTutorial.Contact contains the following properties:
ZenTutorial.PhoneNumber contains the following properties:
ZenTutorial.Contact and ZenTutorial.PhoneNumber form a parent-child relationship. Each Contact can be related to many PhoneNumber. Each PhoneNumber is related to exactly one Contact.
To learn more about serial classes, read Introduction to Serial Objects in Defining and Using Object-Valued Properties section of Using Caché Objects.
To learn more about parent-child relationships, read Relationships in Using Caché Objects.

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