Simple types are used to create derived datatypes. They provide a set of constraints on the value space (a set of values) and the lexical space (a set of valid literals) of a datatype.
A simple type cannot have element content and cannot carry attributes. Elements that contain numbers (and strings, and dates, and so on) but do not contain any sub-elements have a simple type.
The following instructions were written for the Resource perspective, but they will also work in many other perspectives.
To add a simple type:
next to the Base type field
to specify a base type for the simple type. The Set Type dialog
box lists all built-in and user-defined types currently available. You can
change the Scope of the list by selecting one of the
following options:
next to the Item type field
to specify a item type for the simple type. The Set Type dialog
box lists all built-in and user-defined types currently available. You can
change the Scope of the list by selecting one of the
following options:
next to the Member types field
to specify the member types for the simple type. You can select
to add both Built-in simple types and User-defined
simple types to the member types value list.