• Like Movie Category, an authoritative set of production positions.

  • A crew member, someone who works on a movie who is not an actor.

  • Ternary relationship, connecting a Movie, a Crew member, and a Production Category (e.g. director, writer, set designer, ...) This allows for multiple crew members serving the same role, e.g. multiple directors.

  • A crew member has one name.

  • A many:many relationship, allowing a crew member to have other names. The same name may belong to different people.