Mapping of attributes is similar to the way it works for entities. A smart match displays in grey, as shown:

Figure 1. Smart match mapping of Vocabulary Attribute

If an automatic match is not made by the system, then select the appropriate field name from the drop-down in field:column property, as shown:

Figure 2. Manual Mapping of Vocabulary Attribute

A preferred, valid name displays in black. If you enter a non-existent column name or select a name assigned to another column, the value displays in orange.