Annotating a generalization
Tagged values on a
generalization
The tagged
values used to annotate generalizations are presented in the following table:
|
The ... tagged value |
Role |
SQL |
|
{persistence(the_persistence)} |
Indicates whether or not the generalization is persistent. |
|
The {persistence}
tagged value
The
{persistence} tagged value is used to indicate whether or not the
generalization is persistent. If the
parameter is (persistent), then the generalization is persistent, whilst the
(transient) parameter indicates that the generalization is not persistent.