# Missing value management

# Management of explicitly missing values is an alternative to bit-map use
# within the Overlay Section.
# It is intended to reduce the whole GRIB message size and to provide better
# performance when decoding data with missing values

# default = 0 means No explicit missing values included within data values
codetable[1] missingValueManagementUsed ('8.2.table',masterDir,localDir)=0;

#  Primary missing value substitute
unsigned[4] primaryMissingValueSubstitute;

#  Secondary missing value substitute
unsigned[4] secondaryMissingValueSubstitute;