Function is a synonym of Operator. Identity is a type of Operator. Identity is a type of Personality. Personality is related to Mood. 
Truck is related to Vehicle. Vehicle is related to Drive. Enterprise is a type of Drive. Enterprise is related to Name. 
Function <--Synonym--> Operator <--IsA-- Identity --IsA--> Personality <--RelatedTo--> Mood 
Truck <--RelatedTo--> Vehicle <--RelatedTo--> Drive <--IsA-- Enterprise <--RelatedTo--> Name 