Chapter 4 Building Conceptual Data Models

Selecting a data type for a CDM domain from its property sheet

To select a data type for a CDM domain from its property sheet:

1. Select Model→Domains to display the list of domains.
2. Click the domain to define.
   
   An arrow appears at the beginning of the line.
3. Click the Properties tool.
   
   or
   
   Double-click the arrow at the beginning of the line.
   
   The domain property sheet appears.
4. Select a data type from the Data Type dropdown listbox.
   
   
      Selecting a data type from a list of standard data types
   To select a data type from a list of standard data types, click the Question Mark button at the end of the Data Type dropdown listbox, and select the radio button for a data type from the list that appears.
   
   
5. Type the maximum number of characters for the data item in the Length box.
6. If the data type can include values that take a decimal point, type the number of places after the decimal point in the Precision box.
7. Click OK.
   
   The change of data type appears in the list of domains.
   
   
      Undefined data type
   If you do not want to select a data type immediately, you can choose the <Undefined> data type.
   
   

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