ReferenceRML blocks

relationship block

Declare a relationship between entities.

A relationship is valid inside an entity. It requires target and cardinality. Cardinality is one or many.

relationship Lines
  target "Orderline"
  cardinality many
end

Add optional when the relationship is not required.

field block

Declare typed data owned by an entity.

enumeration block

Declare a closed set of named values.