The strong entity set A with descriptive attributes a1, a2, ..., an, having {a1} has the primary key, is always converted into a relation of the same name A with n distinct attributes, each of which corresponds to an attribute of the entity set. The primary key of the entity set, will be the primary key of the relation and will be indicated accordingly in the schema definition
A = ( a1(PK), a2, ..., an )