Additional fields for assets unclear

[christophfriedrich]

Regarding additional fields for assets, the docs say:

For an example see the sentinel2-sample. The Sentinel-2 overall gsd is 10m, because this is the best spatial resolution among all the bands and is defined in Item properties so it can be searched on. In the example Band 5 and others have a gsd of 20m, so that asset specifies the gsd as well, which overrides the Item gsd for this one asset.

But in fact, in the example the gsd is only specified in the properties and nowhere else in the file; just the individual assets' titles mention it (but that's not really machine-readable).

Now I'm unsure what is the correct way to express this in STAC? I raised the issue here, but maybe it will need to be transferred to the stac-examples repo.

[PowerChell]

Closing as duplicate issue #1228