replace EMMO with QUDT to represent the units

[pdr-z]

item number three in Data2RDF Next

Use QUDT for representing the measurement units (instead of EMMO).

remarks

• emmo_unit_to_qudt branch would be a good place to start providing the skeleton for major required modifications, these include:
  • unlike EMMO, QUDT defines prefixed units as unique entities, so we can look them up directly.
  • example: unit:KiloGM qudt:symbol "kg" URI: https://qudt.org/2.1/vocab/unit/vocab/KiloGM
  • adjustments: no need for a SPARQL query to retrieve prefix separately
  • in qudt_utils.py specifically function generate_unit_individuals_qudt fallback case for an unrecognized or unparseable unit needs to be figuared out and adjusted to QUDT