Map existing BODC to CF and EOVs

[JessyBarrette]

I've been looking a bit more into this and I think one pretty robust avenue to map BODC terms to CF would be to leverage the BODC label format through a regex of the expression. That way, we can identify the lowest term which is the best match to a CF term. Any more specific terms would still fall into that too:

Here's a first example of such mapping with the first term in the dictionary been the expression to match within the P01 labels . The sub dictionary P07 present the matching standard_name(s).

{
    "Pressure (spatial coordinate) exerted by the water body": {
        "P07": "sea_water_pressure"
    },
    "Depth (spatial coordinate) relative to water surface in the water body": {
        "P07": "depth"
    },
    "Surface elevation.*of the water body": {
        "P07": "sea_floor_depth_below_sea_surface"
    },
    "Temperature.*of the water body": {
        "P07": ["sea_water_temperature", "sea_surface_temperature"]
    },
    "Electrical conductivity.*of the water body": {
        "P07": "sea_water_electrical_conductivity"
    },
    "Salinity.*of the water body": {
        "P07": "sea_water_salinity"
    },
    "Practical salinity.*of the water body": {
        "P07": "sea_water_practical_salinity"
    },
    "Concentration of oxygen {O2 CAS 7782-44-7} per unit mass of the water body": {
        "P07": ["moles_of_oxygen_per_unit_mass_in_sea_water"]
    },
    "Concentration of oxygen {O2 CAS 7782-44-7} per unit volume of the water body": {
        "P07": [
            "volume_fraction_of_oxygen_in_sea_water",
            "mole_concentration_of_dissolved_molecular_oxygen_in_sea_water",
            "mass_concentration_of_oxygen_in_sea_water"
        ]
    },
    "Concentration of phosphate {PO43- CAS 14265-44-2} per unit mass of the water body": {
        "P07": "moles_of_phosphate_per_unit_mass_in_sea_water"
    },
    "Concentration of phosphate {PO43- CAS 14265-44-2} per unit volume of the water body": {
        "P07": [
            "mass_concentration_of_phosphate_in_sea_water",
            "mole_concentration_of_phosphate_in_sea_water"
        ]
    },
    "Concentration of silicate {SiO44- CAS 17181-37-2} per unit mass of the water body": {
        "P07": "moles_of_silicate_per_unit_mass_in_sea_water"
    },
    "Concentration of silicate {SiO44- CAS 17181-37-2} per unit volume of the water body": {
        "P07": [
            "mass_concentration_of_silicate_in_sea_water",
            "mole_concentration_of_silicate_in_sea_water"
        ]
    },
    "Concentration of nitrite {NO2- CAS 14797-65-0} per unit volume of the water body": {
        "P07": "moles_of_nitrite_per_unit_mass_in_sea_water"
    },
    "Concentration of nitrite {NO2- CAS 14797-65-0} per unit mass of the water body": {
        "P07": "mole_concentration_of_nitrite_in_sea_water"
    },
    "Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body": {
        "P07": "mole_concentration_of_nitrate_and_nitrite_in_sea_water"
    },
    "Concentration of nitrate+nitrite {NO3+NO2} per unit mass of the water body": {
        "P07": "moles_of_nitrate_and_nitrite_per_unit_mass_in_sea_water"
    },
    "Concentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body": {
        "P07": "mass_concentration_of_chlorophyll_a_in_sea_water"
    }
}

Using such method can easily regroup together the different levels of P01 terms. A similar method can likely be use for other mapping to P01.

[JessyBarrette]

The following notebook: https://colab.research.google.com/github/cioos-siooc/cioos-siooc-standards/blob/jessy-dev/ocean_standards/Retrieve_NERC_Terms.ipynb#scrollTo=nVyYhcBY3RrW present an example of how to retrieve the P01 terms from the NVS server and use that regex method above to retrieve the specific terms for interest.