A data cluster is a group of data objects grouped together for the purpose of storage in a
storage medium, which can only be edited using ABAP statements.
The data objects are written to the storage medium using the statement
EXPORT, and are retrieved using the statement
IMPORT. The statement DELETE
can be used to delete a chosen storage memory, and
FREE can be used to delete the ABAP Memory. The statement
IMPORT DIRECTORY generates a list of all data objects that have previously been exported to a database table.
The statements for data clusters are extended by the subclasses of the abstract system class CL_ABAP_EXPIMP (also see classes for data clusters).