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K Glossary
280 U929-J-Z125-9-76
integrity
State of the database in which the data contained in it is complete and free of
errors.
– entity integrity
– referential integrity
– user integrity
interconfiguration
Concerning at least one remote configuration.
interconfiguration consistency
A distributed transaction that has caused updates in at least one remote configu-
ration is terminated in such a way that the updates are either executed on the
databases in each participating DB configuration or on none at all.
Interconfiguration consistency is assured by the two-phase commit protocol.
interconfiguration deadlock
Situation where distributed transactions are mutually locked due to contending
accesses.
interface
In software: memory area used by several different programs for the transfer of
data.
internal version number
Each realm of the database, including DBDIR and DBCOM, has an internal
version number which the utility routines (e.g. BREORG, BALTER) increment by
one whenever a realm is updated. This internal version number is kept in the
act-key-0 page of the realm itself and also in the PHYS VERSION RECORD in
the DBDIR.
item
Smallest nameable unit of data within a record type. It is defined by item type and
item length.
K
KDBS
Compatible database interface. Enables programs to be applied to applications
of DB systems by different manufacturers.