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It seems like the EPATADA's TADA_GetSynonymRef returns a table that does not contain columns with unit information.

To Reproduce

The TADA's TADA_GetSynonymRef returns a data frame with 329 rows and 16 columns, but EPATADA's TADA_GetSynonymRef returns a data frame with only 11 columns. Five columns disappeared, and they are columns with unit information.

TADA_ref <- TADA::TADA_GetSynonymRef()

EPATADA_ref <- EPATADA::TADA_GetSynonymRef()

dim(TADA_ref)
# [1] 329  16

dim(EPATADA_ref)
# [1] 329  11

names(TADA_ref)[!names(TADA_ref) %in% names(EPATADA_ref)]
# [1] "TADA.ResultMeasure.MeasureUnitCode"        "Target.TADA.ResultMeasure.MeasureUnitCode"
# [3] "Target.TADA.UnitConversionFactor"          "Target.TADA.UnitConversionCoefficient"    
# [5] "TADA.UnitConversionRef"

Expected behavior

If the EPATADA package only aims to harmonzie the data based on the CharacteristicName and ResultSampleFractionText, the reference table could be in the correct format and the TADA_GetSynonymRef function works properly. However, the documentation still mentions that "TADA.ResultMeasure.MeasureUnitCode" should be in the table. Please check if the TADA_GetSynonymRef function works as expected.