Assertion: observation's value | /r/HasProperty | error
Facets:
Source sentences:
text: In addition, when there is an error the dataAbsentReason element should be used with the appropriate value ('error' or 'NaN').
text: The special values "E" (error), "L" (below detection limit) and "U" (above detection limit) can be used are in the SampledData data type.