Concept-related Comment 1: Types of concept position can include:
broader concept
superordinate concept
subordinate concept
coordinate concept  
Concept-related Comment 2: If concept position is indicated in a database, its value can be one of the types listed above, or it can also be indicated as a number such as the classification number data category (A.4.2). A number used to represent concept position or the position of a thesaurus descriptor is frequently called a notation.