To import relationships:
An example of a Relationships file would be a csv file: relationships.csv
fk schema,pk schema,fk entity,pk entity,fk attribute,pk attribute dbo,dbo,Products,Suppliers,SupplierID,SupplierID
fk schema,pk schema,fk entity,pk entity,fk attribute,pk attribute
dbo,dbo,Products,Suppliers,SupplierID,SupplierID