adding {TAIL ~ a column} to the relational database table created for the first semantic object to hold a foreign key that links the relational database table created for the first semantic object to the relational database table created for the other semantic object if the maximum cardinality property of the object link attribute associated with the first semantic object is greater than one and the maximum cardinality property of {HEAD ~ the object link attribute} associated with the other semantic object is less than or equal to one; or 
adding { TAIL ~ a column } to the relational database table created for the first semantic object to hold a foreign key that links the relational database table created for the first semantic object to the relational database table created for the other semantic object if the maximum cardinality property of the object link attribute associated with the first semantic object is greater than one and the maximum cardinality property of { HEAD ~ the object link attribute } associated with the other semantic object is less than or equal to one ; or
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH