13.1 Two-octet BMP form (UCS-2)
This coded representation form permits the use of
characters from the Basic Multilingual Plane with each
character represented by two octets.
Within a CC-data-element conforming to the two-octet
BMP form, a character from the Basic Multilingual
Plane shall be represented by two octets comprising
the R-octet and the C-octet as specified in clause 6.2
(i.e. its RC-element).
6.2 Coding of characters
In the canonical form of the coded character set, each
character within the entire coded character set shall be
represented by a sequence of four octets. The most
significant octet of this sequence shall be the groupoctet.
The least significant octet of this sequence shall
be the cell-octet. Thus this sequence may be represented