The Registry data node, with the well-known name "xattrschema" (under the Security junction point, typically /.:/sec), containing the attribute schema information. Also called the attribute schema object. See Attribute Schema .
Logical structures that directly refer to the database's data. Schema objects include such structures as tables, views, sequences, stored procedures, synonyms, indexes, clusters, and database links.
A schema object is logical data storage structures. Schema objects do not have a one-to-one correspondence to physical files on disk that store their information. However, Oracle stores a schema object logically within a tablespace of the database.