UCUM IRI prefix

[ielis]

We should add UCUM builder into Resources. However, the IRI prefix for UCUM is unclear.

[cmungall]

See also: https://github.com/biopragmatics/bioregistry/issues/648

[ielis]

@cmungall Does the following look good to you?

IRI: https://units-of-measurement.org/

The full UCUM Resource:

{
      "id": "ucum",
      "name": "Unified Code for Units of Measure",
      "url": "https://ucum.org",
      "version": "2.1",
      "namespacePrefix": "UCUM",
      "iriPrefix": "https://units-of-measurement.org/"
    }

The following examples from the Units.tsv resolve:

• https://units-of-measurement.org/mol.mL-1
• https://units-of-measurement.org/mg.d-1
• https://units-of-measurement.org/[diop]

However, the mm[Hg] does NOT

• https://units-of-measurement.org/mm[Hg]