siemens, S (unit)

{
    "$id": "https://schemas.optimade.org/defs/v1.2/units/si/1983/named/siemens",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
    "title": "siemens",
    "symbol": "S",
    "display-symbol": "S",
    "description": "A derived SI unit for electrical conductance equal to kg\u207b\u00b9\u00b7m\u207b\u00b2\u00b7s\u00b3\u00b7A\u00b2 using the 1983 SI base units.\n\n\"The International Committee will ask the General Conference to approve two special names: [...] siemens (symbol S) for the SI unit of conductance (\u03a9\u207b\u00b9).\" [14th CGPM Meeting (1971)].\n\nThe siemens was defined at the 14th CGPM Meeting in 1971 and implicitly redefined via the redefinition of the meter at the 17th CGPM Meeting in 1983, resolution 1.",
    "resources": [
        {
            "relation": "Definition at the 14th CGPM Meeting (1971)",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/14-1971"
        },
        {
            "relation": "Redefinition of the metre at the 17th CGPM meeting (1983), resolution 1",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/17-1983/resolution-1"
        },
        {
            "relation": "Wikipedia article describing the unit",
            "resource-id": "https://en.wikipedia.org/wiki/Siemens_(unit)"
        }
    ],
    "defining-relation": {
        "base-units": [
            {
                "symbol": "A",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1967/base/ampere"
            },
            {
                "symbol": "kg",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/kilogram"
            },
            {
                "symbol": "m",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1983/base/metre"
            },
            {
                "symbol": "s",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1967/base/second"
            }
        ],
        "base-units-expression": "A^2*kg^-1*m^-2*s^3"
    },
    "standard": {
        "name": "si",
        "year": 1983,
        "category": "named",
        "symbol": "S"
    },
    "x-optimade-definition": {
        "label": "siemens_si_1983_named",
        "kind": "unit",
        "format": "1.2",
        "version": "1.2.0",
        "name": "siemens"
    }
}