Information about a makumba data definition as obtained from an MDD file or the structure of an OQL query result.
This class is provided for makumba programs to be able to introspect makumba data structures.
An insert in a certain type has violated a unique constraint.
Note: this class has mostly been replaced by
NotUniqueException in combination with
CompositeValidationException , which has more or less the same functionality as this class used to have, but
is ready for form annotation.