b) has highest probability
< !Entity supersetSubset <br /> "But that does not describe superset-subset relationship.">
(replace &supersetSubset; with the
String. Thats the way internal general entities work in xml.)
a) both model abstractions. &supersetSubset;
b) e-r diagrams model data. class diagrams model data as well as behaviour. So its a superset.
c) both might be refined in a physical implementation. &supersetSubset;
d) with class diagramms as well as with e-r diagramms you can model many to many relationsships. &supersetSubset;
e) class diagrams as well e-r diagrams show relationship between data. &supersetSubset;