data_standard_uncertainties
# char value that can be recognised as a number with s. u.
# s. u. should not be reported
_journal_name_full               50(200)
# numb value where s. u. is not allowed
# s. u. should be reported
_chemical_formula_weight_meas    133(7)
_exptl_crystal_density_diffrn    10.42(12)
# numb value where s. u. is allowed
# s. u. should not be reported
_cell_measurement_temperature    293(2)
# malformed numeric data item that contains a non-numeric value
# that has a postfix similar to the s. u. designator
# value should be reported as non numeric, s. u. should not be reported
_diffrn_standards_number '3 (\=500), (004) and (131)'
