{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://maap-project.github.io/maap-dps-stac-extension/v0.1.0/schema.json",
  "title": "MAAP DPS Metadata and Provenance Extension",
  "description": "Extension for metadata and provenance from the MAAP Data Processing Service (DPS).",
  "type": "object",
  "required": [
    "stac_extensions",
    "type",
    "properties"
  ],
  "properties": {
    "stac_extensions": {
      "description": "The Item's declared STAC extensions, including this extension URI.",
      "type": "array",
      "items": {
        "type": "string"
      },
      "allOf": [
        {
          "contains": {
            "const": "https://maap-project.github.io/maap-dps-stac-extension/v0.1.0/schema.json"
          }
        },
        {
          "contains": {
            "const": "https://stac-extensions.github.io/processing/v1.2.0/schema.json"
          }
        }
      ]
    },
    "type": {
      "description": "STAC Items are GeoJSON Features.",
      "const": "Feature"
    },
    "properties": {
      "description": "STAC Item properties containing the required DPS provenance fields and any core or other extension fields.",
      "type": "object",
      "required": [
        "processing:version",
        "maap-dps:algorithm_name",
        "maap-dps:username",
        "maap-dps:tag"
      ],
      "properties": {
        "maap-dps:algorithm_name": {
          "description": "Name of the algorithm that produced the Item.",
          "type": "string"
        },
        "maap-dps:username": {
          "description": "Username associated with the DPS submission.",
          "type": "string"
        },
        "maap-dps:tag": {
          "description": "Tag associated with the DPS submission.",
          "type": ["string", "null"]
        }
      },
      "patternProperties": {
        "^(?!maap-dps:)": {
          "$comment": "Allow STAC core properties and fields from other STAC extensions."
        }
      },
      "additionalProperties": false
    }
  }
}