There are multiple notations of ERD with many modifications. Software Ideas Modeler uses basic Crow's Foot Notation.
Optional participation is expressed using 0..1 or 0..n relations. You can insert such relation directly from toolbox or change the multiplicity from Item Properties dialog (context menu/Properties -> Relationship tab -> Start multiplicity or End multiplicity)
Dusan Rodina - softwareideas.net
26 October 2011 7:13:41
Reply To: RE: ERD diagram
There are multiple notations of ERD with many modifications. Software Ideas Modeler uses basic Crow's Foot Notation.
Optional participation is expressed using 0..1 or 0..n relations. You can insert such relation directly from toolbox or change the multiplicity from Item Properties dialog (context menu/Properties -> Relationship tab -> Start multiplicity or End multiplicity)
Dusan Rodina - softwareideas.net 26 October 2011 7:13:41