{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://opensheaf.org/schemas/opensheaf-archive-0.1.schema.json",
  "title": "OpenSheaf discovery document (opensheaf.json), format opensheaf-archive/0.1",
  "$comment": "Part of OpenSheaf 0.1 (https://opensheaf.org). Dedicated to the public domain under CC0 1.0: https://creativecommons.org/publicdomain/zero/1.0/",
  "type": "object",
  "required": [
    "format",
    "specification",
    "archiveId",
    "name",
    "storageRoot",
    "storageLayout",
    "objects",
    "profiles"
  ],
  "properties": {
    "format": {
      "const": "opensheaf-archive/0.1"
    },
    "specification": {
      "const": "0.1"
    },
    "archiveId": {
      "type": "string",
      "format": "uri"
    },
    "name": {
      "type": "string",
      "minLength": 1
    },
    "contact": {
      "type": "string",
      "format": "uri"
    },
    "storageRoot": {
      "type": "string",
      "format": "uri-reference",
      "pattern": "/$"
    },
    "storageLayout": {
      "const": "0002-flat-direct-storage-layout"
    },
    "mainCollection": {
      "type": "string",
      "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
      "maxLength": 64
    },
    "profiles": {
      "type": "array",
      "items": {
        "enum": [
          "zenodo",
          "texmacs",
          "website"
        ]
      },
      "uniqueItems": true
    },
    "mirrors": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uri",
        "pattern": "/$"
      }
    },
    "feed": {
      "type": "string",
      "format": "uri"
    },
    "objects": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "kind",
          "head",
          "inventorySha512",
          "status"
        ],
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "maxLength": 64
          },
          "kind": {
            "enum": [
              "document",
              "collection"
            ]
          },
          "head": {
            "type": "string",
            "pattern": "^v[1-9][0-9]*$"
          },
          "inventorySha512": {
            "type": "string",
            "pattern": "^[0-9a-f]{128}$"
          },
          "status": {
            "enum": [
              "active",
              "withdrawn"
            ]
          },
          "mirrorOf": {
            "type": "string",
            "format": "uri"
          }
        }
      }
    },
    "tombstones": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "kind",
          "lastVersion",
          "inventorySha512",
          "date",
          "reason"
        ],
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "maxLength": 64
          },
          "kind": {
            "enum": [
              "document",
              "collection"
            ]
          },
          "lastVersion": {
            "type": "string",
            "pattern": "^v[1-9][0-9]*$"
          },
          "inventorySha512": {
            "type": "string",
            "pattern": "^[0-9a-f]{128}$"
          },
          "date": {
            "type": "string",
            "format": "date"
          },
          "reason": {
            "type": "string"
          }
        }
      }
    },
    "keys": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "type"
        ],
        "properties": {
          "type": {
            "type": "string",
            "minLength": 1
          },
          "url": {
            "type": "string",
            "format": "uri"
          },
          "fingerprint": {
            "type": "string"
          }
        },
        "anyOf": [
          {
            "required": [
              "url"
            ]
          },
          {
            "required": [
              "fingerprint"
            ]
          }
        ]
      }
    }
  }
}