2.2.5.3.2.3 Conformant Varying Arrays
NDR64 represents a conformant varying array as an ordered sequence of representations of the array elements preceded by three unsigned 64-bit integers. The first 64-bit integer MUST specify the maximum number of elements in the array. The second 64-bit integer MUST specify the offset from the first index of the array to the first index of the actual subset being passed. The third 64-bit integer MUST specify the actual number of elements being passed. The 64-bit integers that indicate the offset and the actual count MUST always be present, even if the maximum count is 0 (zero). See the following figure.<56>
Figure 8: Conformant varying arrays