{
  "$id": "https://schema.nfh.global/CatalogSubscribeAction/v2.0",
  "x-iri": "https://schema.nfh.global/CatalogSubscribeAction/v2.0",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "description": "Message payload for catalog/subscription. At least one of `networkIds` or `schemaTypes` must be non-empty. An empty `schemaTypes` array is treated as the wildcard sentinel `\"*\"`, matching all schema types for the specified networks. ",
  "required": [
    "subscription"
  ],
  "properties": {
    "subscription": {
      "type": "object",
      "required": [
        "networkIds"
      ],
      "properties": {
        "networkIds": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Network IDs to subscribe to"
        },
        "schemaTypes": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "description": "Schema type URIs to filter on (empty = wildcard)"
        },
        "callbackUrl": {
          "type": "string",
          "format": "uri",
          "description": "Override callback URL (defaults to context.bapUri)"
        },
        "deliveryPolicy": {
          "$ref": "https://schema.nfh.global/DeliveryPolicy/v2.0/schema.json"
        }
      }
    }
  }
}