The first four columns in all release files are shown in Table 3.1.3-1. The next three sections of the specification explain the ways in which these fields are used to support identification, versioning and modularization.
|Part of Primary Key|
Uniquely identifies a component.
|Uniquely identifies a reference set member.|
Specifies the inclusive date at which this rows state became the then current valid state of the identified component or reference set member