schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/DACCS-Climate/nexgddp-stac-extension/v1.0.0/json-schema/schema.json#",
  "title": "NEX GDDP data STAC Extension",
  "description": "STAC Extension for NEX GDDP data stored on the Marble Platform.",
  "oneOf": [
    {
      "$comment": "This is the schema for STAC Items. Remove this object if this extension only applies to Collections.",
      "allOf": [
        {
          "$ref": "#/definitions/stac_extensions"
        },
        {
          "type": "object",
          "required": [
            "type",
            "properties",
            "assets"
          ],
          "properties": {
            "type": {
              "const": "Feature"
            },
            "properties": {
              "allOf": [
                {
                  "$comment": "Require fields here for Item Properties.",
                  "required": [
                    "nexgddp:license",
                    "nexgddp:version",
                    "nexgddp:calendar",
                    "nexgddp:frequency",
                    "nexgddp:source_id",
                    "nexgddp:Conventions",
                    "nexgddp:institution",
                    "nexgddp:variable_id",
                    "nexgddp:cmip_version",
                    "nexgddp:experiment_id",
                    "nexgddp:variant_label",
                    "nexgddp:institution_id"
                    ]
                },
                {
                  "$ref": "#/definitions/fields"
                }
              ]
            },
            "assets": {
              "$comment": "This validates the fields in Item Assets, but does not require them.",
              "type": "object",
              "additionalProperties": {
                "$ref": "#/definitions/fields"
              }
            }
          }
        }
      ]
    }
  ],
  "definitions": {
    "stac_extensions": {
      "type": "object",
      "required": [
        "stac_extensions"
      ],
      "properties": {
        "stac_extensions": {
          "type": "array",
          "contains": {
            "const": "https://raw.githubusercontent.com/DACCS-Climate/nexgddp-stac-extension/v1.0.0/json-schema/schema.json"
          }
        }
      }
    },
    "require_any_field": {
      "$comment": "Please list all fields here so that we can force the existence of one of them in other parts of the schemas.",
      "anyOf": [
        {"required": ["nexgddp:license"]},
        {"required": ["nexgddp:version"]},
        {"required": ["nexgddp:calendar"]},
        {"required": ["nexgddp:frequency"]},
        {"required": ["nexgddp:source_id"]},
        {"required": ["nexgddp:Conventions"]},
        {"required": ["nexgddp:institution"]},
        {"required": ["nexgddp:variable_id"]},
        {"required": ["nexgddp:cmip_version"]},
        {"required": ["nexgddp:experiment_id"]},
        {"required": ["nexgddp:variant_label"]},
        {"required": ["nexgddp:institution_id"]}
      ]
    },
    "fields": {
      "type": "object",
      "properties": {
        "nexgddp:license": {
          "title": "Data license",
          "type": "string"
        },
        "nexgddp:version": {
          "title": "Data version",
          "type": "string"
        },
        "nexgddp:calendar": {
          "title": "Calendar of the data",
          "type": "string",
          "enum": ["proleptic_gregorian", "365_day", "360_day", "standard"]
        },
        "nexgddp:frequency": {
          "title": "Temporal frequency of the data",
          "type": "string",
          "enum": ["day"]
        },
        "nexgddp:source_id": {
          "title": "Source ID of the CMIP6 model",
          "type": "string"
        },
        "nexgddp:Conventions": {
          "title": "Data CF convention",
          "type": "string"
        },
        "nexgddp:institution": {
          "title": "Name of the institution which produced the CMIP6 model",
          "type": "string"
        },
        "nexgddp:variable_id": {
          "title": "Variable ID of the CMIP6 variable",
          "type": "string"
        },
        "nexgddp:cmip_version": {
          "title": "Generation of the CMIP project",
          "type": "string",
          "enum": ["CMIP5", "CMIP6"]
        },
        "nexgddp:experiment_id": {
          "title": "Experiment ID of the CMIP6 experiment",
          "type": "string",
          "enum": ["historical", "ssp126", "ssp245", "ssp370", "ssp585"]
        },
        "nexgddp:variant_label": {
          "title": "String representation of the experiment variant",
          "type": "string"
        },
        "nexgddp:institution_id": {
          "title": "ID of the institution that created this model",
          "type": "string"
        }
      },
      "patternProperties": {
        "^(?!nexgddp:)": {
          "$comment": "Above, change `template` to the prefix of this extension"
        }
      },
      "additionalProperties": false
    }
  }
}