# derive is a kind of which dependency

A functional dependency (FD) is a relationship between two attributes, typically between the PK and other non-key attributes within a table. For any relation R, attribute Y is functionally dependent on attribute X (usually the PK), if for every valid instance of X, that value of X uniquely determines the value of Y. This relationship is indicated by the representation below :
X ———–> Y
The left side of the above FD diagram is called the determinant, and the right side is the dependent.

Types of dependency relationships
Type of dependencyKeyword or Stereotype
Abstraction«abstraction», «derive», «refine», or «trace»
Binding«bind»
Realization«realize»
Substitution«substitute