Processing properties are not required on providers

[l0b0]

The readme says

At least one of the fields must be specified.

, but removing all the processing:* properties from the providers objects does not result in a validation error.

Example collection.json:

{
  "stac_version": "1.0.0",
  "stac_extensions": [
    "https://stac-extensions.github.io/processing/v1.0.0/schema.json"
  ],
  "type": "Collection",
  "id": "Sentinel2-L2A",
  "title": "Sentinel-2 MSI: MultiSpectral Instrument, Level-2A",
  "description": "Sentinel-2 is a wide-swath, high-resolution, multi-spectral imaging mission.",
  "license": "proprietary",
  "providers": [
    {
      "name": "European Union/ESA/Copernicus",
      "roles": [
        "producer",
        "licensor"
      ],
      "url": "https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi"
    },
    {
      "name": "Processing Corp.",
      "roles": [
        "processor"
      ]
    },
    {
      "name": "Storage Provider, Inc.",
      "roles": [
        "host"
      ]
    }
  ],
  "extent": {
    "spatial": {
      "bbox": [
        [
          -180,
          -56,
          180,
          83
        ]
      ]
    },
    "temporal": {
      "interval": [
        [
          "2015-06-23T00:00:00Z",
          null
        ]
      ]
    }
  },
  "summaries": {
    "datetime": {
      "minimum": "2015-06-23T00:00:00Z",
      "maximum": "2019-07-10T13:44:56Z"
    },
    "platform": [
      "sentinel-2a",
      "sentinel-2b"
    ],
    "constellation": [
      "sentinel-2"
    ],
    "instruments": [
      "msi"
    ],
    "gsd": [
      10,
      30,
      60
    ],
    "processing:level": [
      "L1C",
      "L2A"
    ]
  },
  "links": [
    {
      "rel": "self",
      "href": "https://processing-corp.com/catalog/COPERNICUS_S2.json"
    },
    {
      "rel": "parent",
      "href": "https://processing-corp.com/catalog/catalog.json"
    },
    {
      "rel": "root",
      "href": "https://processing-corp.com/catalog/catalog.json"
    },
    {
      "rel": "license",
      "href": "https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/Sentinel_Data_Terms_and_Conditions.pdf",
      "title": "Legal notice on the use of Copernicus Sentinel Data and Service Information"
    }
  ]
}

Is this intentional? That is, are the processing properties not meant to be required in the provider objects?

Example test.

[m-mohr]

That is, are the processing properties not meant to be required in the provider objects?

No, the processing properties were not meant to be required in Provider objects. We need to clarify this in the docs (and potentially fix the schema accordingly, too).

[l0b0]

Ping?

[m-mohr]

See PR #13