Schema:

A schema is a collection of objects. Schema objects are the 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. Associated with each database user is a schema by the same name. By default, each database user creates and has access to all objects in the corresponding schema.

Database Object Types:

The Database Object Types list box displays the object types within the selected schema.

INTYPE Object Types:

The INTYPE Object Types list box displays the object types within the INTYPE file.

Add:

The Add button adds the selected object types in the Database Object Types list box to the INTYPE Object Types list box.

Remove:

The Remove button removes the selected object types from the INTYPE Object Types list box.