Getting Started with InfoSphere Data Architect

Chapter 4 – Domain Models 79
2. Specify the File name for the domain model: STUDENT_PII_DOMAIN.
3. Make sure that the Add to project properties option is selected, then click Finish.
The STUDENT_PII_DOMAIN.ddm domain model is created in the Data Models
folder of the data design project.
4. Specify the name for the root package of the domain model:
a. Select the package underneath the STUDENT_PII_DOMAIN domain model,
as shown in Figure 4.1.
Figure 4.1 – Selecting the STUDENT_PII_DOMAIN domain model
The properties for the package display in the Properties view.
b. Specify the following name in the Name field: STUDENT_PII_ROOT
4. Save your work.
The domain model and package are created and displayed in the Data Project Explorer.
Now that you have created an empty domain model, you can add an atomic domain, list
domain, or union domain. In this exercise, you will add an atomic domain to secure the
social security numbers of each student.
4.1.2 Atomic domains
Atomic domains are custom data types that you create to maintain consistency across your
organization. You create domain-specific rules, then use these rules to define other objects
within your data models.
For example, you could define a domain model for grades to ensure that no values outside
an appropriate range are entered. You can only accept values between 1 and 10 on a 10-
point scale.