Data Model Objects › Attribute Overview › Attribute Domain

Attribute Domain

The Domain specifies a collection of values from which each value of an Attribute must be taken. Each Attribute falls into one of the following domains:

• Text attribute value is a character string
• Date attribute value represents a date (including century)
• Time attribute value represents an hour, minute, and second
• Number attribute value is numeric. If you use an arithmetic calculation to specify the value of an attribute, the attribute's domain must be a number.
• Timestamp attribute value represents a combination of the date and the time of day to the millisecond.
• DBCS text type indicates a double-byte character set.
• Mixed text type indicates a combination of a double-byte character set and a single-byte character set.
• GUI Object represents a pointer to an OLE object (this option is available only with the workset attribute).
• BLOB attribute value represents a variable sized Binary Large Object used to store large data objects such as digital images, video, or sound files.

Note: For numeric attributes, the actual precision of arithmetic operations and number of significant digits depends on the version of the platform, compiler, and DBMS. In general, you should be able to get up to at least 15 significant digits of accuracy.