Should Sentinel-2 STAC Collection declare EO extension?

[kylebarron]

Should the Sentinel 2 collection declare the eo extension as well? Right now it puts eo:bands on item_assets but the top-level stac_extensions array doesn't declare the EO extension. https://planetarycomputer.microsoft.com/api/stac/v1/collections/sentinel-2-l2a

@TomAugspurger pointed out https://github.com/radiantearth/stac-spec/blob/master/collection-spec/collection-spec.md#stac_extensions, which says

This must not declare the extensions that are only implemented in child Collection objects or child Item objects.

But I'd counter by pointing out that the EO extension spec's json schema also applies to a collection's item_assets. Therefore, I'd think that since the Sentinel 2 Collection file defines eo:bands on item_assets, the extension should be declared.

[TomAugspurger]

Worth mentioning that we do include eo in collections like https://planetarycomputer.microsoft.com/api/stac/v1/collections/modis-09A1-061 and https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-c2-l2

[ghidalgo3]

Closed due to inactivity, feel free to reopen if you would like to continue this discussion.