A page is the smallest unit of storage in an IDMS database.
A record occurrence is the instances of a record; it is the smallest addressable unit of data. A type is the description of a record; there need not be any occurrences.
A run-unit is a logical unit of work; it is analogous to a CICS task.
It rolls back (reverses) all database updates to the point of the last rollback or to the beginning of the run-unit.
It generates a bind run-unit and binds all the records for the sub-schema the program is referencing.
The old joke - where the programmer thinks he is, but the DBMS knows he is not. Currency is the location within the database during run-unit execution. There are four levels of currency: current of run-unit
IDMS uses record locks to prevent another run-unit from updating the same record.
Latest Answer : All objects and relations beween them are 100% "described" in IDMS IDD. So all tranzactions of any user or programmer are 100% documented. Advanced IDD administrator knows everytning about any user task or development step (about programmers ...
A bind associates record types with the program work area; for run unit and records it is the first command issued in the program.