BBOX of collection description endpoint

[vvmruder]

As seen here: https://github.com/geopython/pygeoapi/blob/master/pygeoapi/api/__init__.py#L982-L994

The returned BBOX of a collection is a list of BBOXES. How is that meant to be used?

I understand that as the possibility to deliver BBOX in different projections like it is done in old WxS XMLs...

However, as far as I see it structure wise currently we can deliver multiple BBOXes but only one CRS. Right? Is this a bug?

Currently an exemplaric response on collections/<collection_id>?f=json looks like:

...
"extent":{
    "spatial":{
        "bbox":[
            [
                8.39950833420434,
                47.092726433736836
                8.652775890307305,
                47.216270503087486
            ]
        ],
        "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84"
    }
}
...

Or is the response meant to deliver multiple BBOXes in the same CRS. If that is the case, what would be the usecase for that?

[ridoo]

There's a longer discussion about this. You could start here: opengeospatial/ogcapi-common#91