User-defined attributes that can be used with the KeyedItem mixin. The constraints module contains: $(TOC UniqueConstraintColumn) $(TOC PrimaryKeyColumn) $(TOC ExclusionConstraint) $(TOC CheckConstraint) $(TOC NotNull) $(TOC SetConstraint) $(TOC EnumConstraint) $(TOC Rule) $(TOC ForeignKey) $(TOC ForeignKeyConstraint) $(TOC Default)
The db_exceptions module contains: $(TOC UniqueConstraintException) $(TOC KeyedException) $(TOC CheckConstraintException) $(TOC ForeignKeyException) $(TOC ExclusionConstraintException)