The document discusses the modeling of 'plane_service' in a database context, focusing on the use of relationships and foreign keys. It highlights scenarios involving single attribute values and the participation of owning entity primary keys. Additionally, it touches on the modeling of atomic attributes and component attributes related to foreign keys.

1. How is Plane_service modeled? Relation and foreign key with single attribute value Relation
with owning entity primary key participating in primary key Foreign key for "relationship"
relation) Relation Relation and two foreign keys Not modeled Into any relationship One Atomic
Attribute Relation and in foreign keys Set of simple component artributes