Some databases may disallow adding an attribute with the same name after it has been dropped from a custom type. Usually, this problem can be rectified by dropping the corresponding column in the underlying table. In general, extra care must be exercised in dropping attributes or types.
com.documentum.fc.client.aspect.IDfAspects interface for attaching, detaching, and listing aspects attached to an object.
Recall that a type uses up to two tables (one for single-valued properties and one for repeating) of its own for storing non-inherited properties of its objects. There are additional database views available for retrieving all the attributes in the type together.
Note that it is possible to create a subtype ...