UCUM temperature units conversion fails

[arminShv]

Hello,

The library hapi-fhir-validation-5.7.0.jar brings with it the library ucum-1.0.3.jar. UCUM-Lib has a problem converting the temperature units to canonical form (e.g. Celsius to Kelvin or Fahrenheit to Kelvin). I would like to know if you already have a solution for this.

To Reproduce Try to get a canonical value-code-pair for "20 Celsius" by UcumEssenceService.getCanonicalForm(valueCodePair)

UcumEssenceService ucumEssenceService = new UcumEssenceService(ClasspathUtil.loadResourceAsStream("/ucum-essence.xml"));
Pair canonicalFormPair = ucumEssenceService.getCanonicalForm(new Pair(new Decimal("20"), "Cel"));

The result is:

Expected behavior If the conversion works correctly (e.g. for "20 kg"), the result will look like this:

Environment OS: Windows 11