CML: Differentiate between dimension DimCoords and aux DimCoords

[pelson]

As it stands, it is not possible to tell which "DimCoord" is the "dimension coordinate" of a dimension (too many dimensions, I apologise). For instance, with the following CML one cannot tell that forecast_period was not the dimensioned DimCoord:

<?xml version="1.0" ?>
<cubes xmlns="urn:x-iris:cubeml-0.2">
  <cube units="unknown">
    <coords>
      <coord>
        <dimCoord id="ca4300da" points="[0]" shape="(1,)" standard_name="forecast_period" units="Unit('1')" value_type="int32"/>
      </coord>
      <coord datadims="[0]">
        <dimCoord id="fe82bc89" points="[5, 10]" shape="(2,)" standard_name="forecast_reference_time" units="Unit('1')" value_type="int32"/>
      </coord>
      <coord datadims="[0]">
        <dimCoord bounds="[[5, 5],
                [10, 10]]" id="c2f882b5" points="[2, 5]" shape="(2,)" standard_name="time" units="Unit('1')" value_type="int32"/>
      </coord>
      <coord datadims="[2]">
        <dimCoord id="b0c4282a" long_name="x" points="[0, 1, 2, 3, 4]" shape="(5,)" units="Unit('1')" value_type="int32"/>
      </coord>
      <coord datadims="[1]">
        <dimCoord id="31e14d0d" long_name="y" points="[0, 1, 2, 3]" shape="(4,)" units="Unit('1')" value_type="int32"/>
      </coord>
    </coords>
    <cellMethods/>
    <data dtype="float32" shape="(2, 4, 5)" state="loaded"/>
  </cube>
</cubes>

Add this metadata & update the test results.

[bblay]

👍

[cpelley]

👍

[pelson]

Hi

[github-actions]

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[rcomer]

Stale action is supposed to skip anything with a “Good First Issue” label 😕