spec.json

{
  "asyncapi": "2.0.0",
  "defaultContentType": "application/json",
  "info": {
    "title": "Capacitydemand-V1",
    "version": "1.0.0",
    "description": "This API provides services to interact with capacitydemand.",
    "contact": {
      "name": "contactName",
      "email": "info@sbb.ch"
    }
  },
  "channels": {
    "myTopic": {
      "publish": {
        "message": {
          "$ref": "#/components/messages/myMessage"
        }
      }
    }
  },
  "components": {
    "messages": {
      "myMessage": {
        "payload": {
          "$ref": "#/components/schemas/mySchema"
        }
      }
    },
    "schemas": {
      "mySchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "type": "object",
        "anyOf": [
          {
            "required": [
              "myPropertyA"
            ]
          },
          {
            "required": [
              "myPropertyB"
            ]
          }
        ],
        "properties": {
          "myPropertyA": {
            "type": "string"
          },
          "myPropertyB": {
            "type": "string"
          }
        }
      }
    }
  }
}