Technical data

CDD/Repository
See Oracle CDD/Repository.
CODASYL
An acronym for the COnference on DAta SYstems Languages, the committee that
produced the document titled CODASYL COBOL Journal of Development. This
document serves as the basis for the standardization of the Oracle CODASYL
DBMS data manipulation language (DML).
CONCURRENT usage mode
The state of a realm in which it may be accessed by concurrent run units.
concurrency
The simultaneous use of a database or a sequential, relative, or indexed file by
more than one user.
currency indicators
Pointers maintained by the Database Control System (DBCS) that serve as place
markers in the database for your run unit.
data definition languages (DDL)
The languages used to describe schemas, subschemas, and storage schemas. See
also schema DDL, storage schema DDL, and subschema DDL.
data manipulation language (DML)
The Oracle CODASYL DBMS language interface that permits programs to
interact with Oracle CODASYL DBMS databases.
data-name
A user-defined word that names a data item described in a data description
entry. In general formats, data-name represents a word that must not be
reference-modified, subscripted, indexed, or qualified unless specifically allowed
by rules of the format.
database
A collection of related records on a mass storage device. All of the records and
sets are controlled by a specific schema.
database administrator (DBA)
The person or group of people responsible for planning, designing, implementing,
and maintaining a database.
database aggregate
A subschema group item or table defining one or more database items. A
database aggregate can contain one or more database aggregates.
Database Control System (DBCS)
The component of Oracle CODASYL DBMS that, together with the OpenVMS
operating systems, provides run-time control of database processing.
Glossary–2