Identifies the type of this data group.
object Data is a single MIB object. The fully
instantiated OID is specified in
cdcDGBaseObject.
table Data is a logical table. The columns of
this table correspond to the base objects
specified in cdcDGBaseObjectTable, and the
rows correspond to the values of the instances
specified in cdcDGInstanceTable.
This object's value cannot be modified while the value of
cdcDGRowStatus is 'active'.