When ContainerType is IG_ISIS_CONT_LIST, it contains the list of allowed values.
When ContainerType is IG_ISIS_CONT_RANGE, then Array[0] is the minimum value, Array(1) is the maximum value, and Array(2) is the step value.
If DataType is IG_ISIS_TAG_TYPE_RATIONAL each tag value for both containers is represented as two array elements of type Long, i.e., Array[i*2] is the numerator of the value, Array[i*2+1] is the denominator of the value.