{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://downloads.example/schemas/digital-artifact-2.json",
  "title": "Digital artifact attributes",
  "description": "Service-defined attributes for a downloadable digital artifact.",
  "type": "object",
  "required": [
    "version",
    "license",
    "files"
  ],
  "additionalProperties": false,
  "properties": {
    "version": {
      "type": "string",
      "title": "Version",
      "description": "Publisher-assigned release version.",
      "x-odp-comparison": "exact"
    },
    "license": {
      "type": "string",
      "title": "License",
      "description": "SPDX license expression governing use of the artifact.",
      "examples": [
        "Apache-2.0"
      ],
      "x-odp-comparison": "exact"
    },
    "languages": {
      "type": "array",
      "title": "Languages",
      "description": "BCP 47 language tags for languages represented in the content.",
      "uniqueItems": true,
      "items": {
        "type": "string"
      },
      "x-odp-comparison": "set"
    },
    "files": {
      "type": "array",
      "title": "Files",
      "description": "Downloadable representations included in this release.",
      "minItems": 1,
      "items": {
        "$ref": "#/$defs/file"
      }
    }
  },
  "$defs": {
    "file": {
      "type": "object",
      "required": [
        "media_type",
        "byte_size",
        "sha256"
      ],
      "additionalProperties": false,
      "properties": {
        "media_type": {
          "type": "string",
          "title": "Media type",
          "description": "Internet media type of the file.",
          "x-odp-comparison": "exact"
        },
        "byte_size": {
          "type": "integer",
          "title": "File size",
          "description": "Exact file size in bytes.",
          "minimum": 0,
          "x-odp-unit": {
            "code": "By"
          },
          "x-odp-comparison": "numeric"
        },
        "sha256": {
          "type": "string",
          "title": "SHA-256 digest",
          "description": "Lowercase hexadecimal SHA-256 digest of the file bytes.",
          "pattern": "^[a-f0-9]{64}$",
          "x-odp-comparison": "exact"
        }
      }
    }
  }
}