Enums

enum Cardinality → string

Relationship cardinality

case exactlyOne → '||'

case oneOrMore → '}|'

case zeroOrMore → '}o'

case zeroOrOne → '|o'

enum Key → string

Key type

case foreignKey → 'FK'

case primaryKey → 'PK'

case uniqueKey → 'UK'

enum RelationshipType → string

Relationship type

case identifying → '--'

case nonIdentifying → '..'