Types of attribute definitions Three options are available for defining attributes. Attribute as a trait The simplest way to create an attribute definition is the trait with a unique name (which may also be of a technical nature) and a natural language description. Attribute with single selection A single-selection attribute is very similar to a trait with the difference that this trait has a value. Each attribute can have any number of values, but when assigning resources or operations, only one value can be set for that attribute. Attribute with multiple selection An attribute with multiple selection is also an attribute with values. When assigned to data sets, the attribute can take on several values at the same time. ×