json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "properties": {
          "author": {
              "type": "string"
          },
          "category": {
              "type": "string"
          },
          "cost": {
              "minimum": 0,
              "type": "integer"
          },
          "desc_en": {
              "pattern": "^.*\\.md$",
              "type": "string"
          },
          "desc_ru": {
              "pattern": "^.*\\.md$",
              "type": "string"
          },
          "flag": {
              "type": "string"
          },
          "flag_comp": {
              "type": "string"
          },
          "images": {
              "items": {
                  "properties": {
                      "filename": {
                          "pattern": "^.*\\.tar$",
                          "type": "string"
                      },
                      "tcp_ports": {
                          "items": {
                              "minimum": 0,
                              "type": "integer"
                          },
                          "minItems": 1,
                          "type": "array",
                          "_uniqueItems": true
                      },
                      "udp_ports": {
                          "items": {
                              "minimum": 0,
                              "type": "integer"
                          },
                          "minItems": 1,
                          "type": "array",
                          "_uniqueItems": true
                      }
                  },
                  "required": [
                      "filename"
                  ],
                  "type": "object"
              },
              "minItems": 1,
              "type": "array",
              "_uniqueItems": true
          },
          "schema_version": {
              "pattern": "^0\\.2$",
              "type": "string"
          },
          "title_en": {
              "type": "string"
          },
          "title_ru": {
              "type": "string"
          },
          "upload_timestamp": {
              "type": "integer"
          },
          "writeup_en": {
              "pattern": "^.*\\.md$",
              "type": "string"
          },
          "writeup_ru": {
              "pattern": "^.*\\.md$",
              "type": "string"
          }
      },
      "required": [
          "schema_version",
          "title_ru",
          "title_en",
          "category",
          "cost",
          "desc_ru",
          "desc_en",
          "writeup_ru",
          "writeup_en",
          "flag",
          "flag_comp"
      ],
      "title": "BlackBox 3.0 task meta-info v0.2",
      "type": "object"
  }