Make sure that `ioos_category` and `standard_name` are accessible for all cube variables

[abkfenris]

(Encode all attrs into STAC in a custom ?)

[abkfenris]

Unsuprisingly they are not.

"hs": {
        "type": "data",
        "dimensions": [
          "time",
          "longitude",
          "latitude",
          "forecast_reference_time"
        ],
        "extent": [
          0.0,
          10.142937660217285
        ],
        "unit": "meters",
        "description": "Significant Wave Height"
      },

[abkfenris]

Info on ioos_category

ioos_category -- This is a REQUIRED variable attribute if is set to true (the default) in setup.xml; otherwise, it is OPTIONAL. For example, Salinity The categories are from NOAA's Integrated Ocean Observing System (IOOS) (external link).

• (As of writing this) we aren't aware of formal definitions of these names.
• The core names are from Zdenka Willis' .ppt "Integrated Ocean Observing System (IOOS) NOAA's Approach to Building an Initial Operating Capability" and from the US IOOS Blueprint (external link) (page 1-5).
• It is likely that this list will be revised in the future. If you have requests, please email BobSimons2.00 at gmail.com.
• ERDDAP supports a larger list of categories than IOOS does because Bob Simons added additional names (mostly based on the names of scientific fields, for example, Biology, Ecology, Meteorology, Statistics, Taxonomy) for other types of data.
• The current valid values in ERDDAP are Bathymetry, Biology, Bottom Character, CO2, Colored Dissolved Organic Matter, Contaminants, Currents, Dissolved Nutrients, Dissolved O2, Ecology, Fish Abundance, Fish Species, Heat Flux, Hydrology, Ice Distribution, Identifier, Location, Meteorology, Ocean Color, Optical Properties, Other, Pathogens, Phytoplankton Species, Pressure, Productivity, Quality, Salinity, Sea Level, Statistics, Stream Flow, Surface Waves, Taxonomy, Temperature, Time, Total Suspended Matter, Unknown, Wind, Zooplankton Species, and Zooplankton Abundance.
• There is some overlap and ambiguity between different terms -- do your best.
• If you add ioos_category to the list of in ERDDAP's setup.xml file, users can easily find datasets with similar data via ERDDAP's "Search for Datasets by Category" on the home page.
• Try using ioos_category to search for datasets of interest.
• There was a discussion about ERDDAP and ioos_category in the ERDDAP Google Group. (external link)

From https://mmisw.org/ont/ioos/category :

	chemical	Chemical Constituent
atmospheric	atmospheric	Atmospheric Variable
coordinate	coordinate	Observed properties of sensor or platform
water_property	water_property	Water Property
waves	waves	Surface Waves
water_quality	water_quality	Water Quality
sensor	sensor	Sensor
relative_location	relative_location	Relative Location
quality_control	quality_control	Quality Control
currents	currents	Ocean Currents