The OBJECTS clause, which must be present, is used to name each object contained in the conformance group. Each of the named objects must be defined in the same information module as the OBJECT-GROUP macro appears, and must have a MAX-ACCESS clause value of "accessible-for-notify", "read-only", "read-write", or "read-create".
It is required that every object defined in an information module with a MAX-ACCESS clause other than "not-accessible" be contained in at least one object group. This avoids the common error of adding a new object to an information module and forgetting to add the new object to a group.