Section 6: BIT-MAP SECTION
|1-4||section6Length||unsigned||Length of section in octets (nn)|
|5||numberOfSection||unsigned||Number of section (6)|
|6||bitMapIndicator||codetable||Bit-map indicator (see Code Table 6.0 and Note 1)|
|7-nn||Bit-map - Contiguous bits with a bit to data point correspondence, ordered as defined in Section 3. A bit set equal to 1 implies the presence of a data value at the corresponding data point, whereas a value of 0 implies the absence of such a value.|
( 1) If octet 6 is not zero, the length of the Section is 6 and octets 7-nn are not present.