{
  "groups": {
    "messagegroups": {
      "singular": "messagegroup",
      "modelversion": "1.0-rc1",
      "compatiblewith": "https://xregistry.io/xreg/domains/message/specs/model.json",
      "attributes": {
        "envelope": {
          "name": "envelope",
          "type": "string",
          "description": "Envelope format identifier that defines the common metadata information for the message. All definitions in this group share this envelope format. Mixed-envelope-format groups are not permitted. The predefined envelope format is CloudEvents/1.0"
        },
        "protocol": {
          "name": "protocol",
          "type": "string",
          "description": "Protocol identifier that defines the transport message protocol. All definitions in this group share this protocol type. Mixed-protocol groups are not permitted. Predefined protocol formats are 'AMQP/1.0', 'MQTT/3.1.1', 'MQTT/5.0', 'KAFKA', 'HTTP', and 'NATS'"
        },
        "*": {
          "name": "*",
          "type": "any",
          "description": "Any other attribute that is common to all definitions in this group"
        }
      },
      "resources": {
        "messages": {
          "singular": "message",
          "maxversions": 1,
          "setdefaultversionsticky": false,
          "hasdocument": false,
          "modelversion": "1.0-rc1",
          "compatiblewith": "https://xregistry.io/xreg/domains/message/specs/model.json",
          "attributes": {
            "basemessageurl": {
              "name": "basemessageurl",
              "type": "uri",
              "description": "Reference to a base definition for this definition, either via a (relative) URL or a fragment identifier. The base definition is overridden by this definition. If not present, this definition does not override any base definition"
            },
            "envelope": {
              "name": "envelope",
              "type": "string",
              "description": "Message envelope format identifier. This attribute MUST be the same as the 'envelope' attribute of the definition group, but is not automatically inherited because definitions may be cross-referenced across groups. The predefined envelope format is 'CloudEvents/1.0'",
              "ifvalues": {
                "CloudEvents/1.0": {
                  "siblingattributes": {
                    "envelopemetadata": {
                      "name": "envelopemetadata",
                      "type": "object",
                      "description": "CloudEvents attribute declarations, adding constraints to the CloudEvents envelope not yet covered by the CloudEvents spec https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md",
                      "attributes": {
                        "specversion": {
                          "name": "specversion",
                          "description": "CloudEvents specversion https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#specversion",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "enum": [
                                "string"
                              ]
                            },
                            "value": {
                              "name": "value",
                              "description": "CloudEvents spec version (fixed to '1.0')",
                              "type": "string",
                              "enum": [
                                "1.0"
                              ]
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "description": "CloudEvents specversion is always required",
                              "required": true,
                              "default": true,
                              "enum": [
                                true
                              ]
                            }
                          }
                        },
                        "id": {
                          "name": "id",
                          "description": "CloudEvents id https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#id",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "string",
                              "enum": [
                                "uritemplate",
                                "string"
                              ]
                            },
                            "value": {
                              "name": "value",
                              "description": "CloudEvents id value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "description": "CloudEvents id is always required",
                              "required": true,
                              "default": true,
                              "enum": [
                                true
                              ]
                            }
                          }
                        },
                        "type": {
                          "name": "type",
                          "description": "CloudEvents type https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#type",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "string"
                            },
                            "value": {
                              "name": "value",
                              "description": "CloudEvents type value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "description": "CloudEvents type is always required",
                              "required": true,
                              "default": true,
                              "enum": [
                                true
                              ]
                            }
                          }
                        },
                        "source": {
                          "name": "source",
                          "description": "CloudEvents source https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#source-1",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "uritemplate",
                              "enum": [
                                "uritemplate",
                                "string"
                              ]
                            },
                            "value": {
                              "name": "value",
                              "description": "CloudEvents source value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "description": "CloudEvents source is always required",
                              "enum": [
                                true
                              ],
                              "required": true,
                              "default": true
                            }
                          }
                        },
                        "subject": {
                          "name": "subject",
                          "description": "CloudEvents subject https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#subject",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "uritemplate",
                              "enum": [
                                "uritemplate",
                                "string"
                              ]
                            },
                            "value": {
                              "name": "value",
                              "description": "CloudEvents subject value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "description": "CloudEvents subject required",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            }
                          }
                        },
                        "time": {
                          "name": "time",
                          "description": "CloudEvents time https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#time",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "timestamp",
                              "enum": [
                                "timestamp"
                              ]
                            },
                            "value": {
                              "name": "value",
                              "description": "The timestamp value constraint.",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            }
                          }
                        },
                        "dataschema": {
                          "name": "dataschema",
                          "description": "CloudEvents dataschema https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#dataschema. The URI of the schema for the event payload. Absence indicates no known schema. This attribute corresponds to the 'dataschemauri' attribute in the message definition and MUST be the same as the 'dataschemauri' attribute of the definition if present.",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "uritemplate"
                            },
                            "value": {
                              "name": "value",
                              "description": "The URI value constraint",
                              "type": "uritemplate"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            }
                          }
                        },
                        "datacontenttype": {
                          "name": "datacontenttype",
                          "description": "CloudEvents datacontenttype https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md#datacontenttype.",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "type": "string",
                              "required": true,
                              "default": "string"
                            },
                            "value": {
                              "name": "value",
                              "description": "The content type value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            }
                          }
                        },
                        "*": {
                          "name": "*",
                          "description": "CloudEvent extension property",
                          "type": "object",
                          "attributes": {
                            "description": {
                              "name": "description",
                              "type": "string"
                            },
                            "type": {
                              "name": "type",
                              "description": "The value type",
                              "type": "string",
                              "required": true,
                              "default": "string"
                            },
                            "value": {
                              "name": "value",
                              "description": "The value constraint",
                              "type": "string"
                            },
                            "required": {
                              "name": "required",
                              "description": "Whether the extension is required",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            }
                          }
                        }
                      }
                    },
                    "envelopeoptions": {
                      "name": "envelopeoptions",
                      "type": "object",
                      "description": "Envelope metadata constraints",
                      "attributes": {
                        "mode": {
                          "name": "mode",
                          "type": "string",
                          "enum": [
                            "binary",
                            "structured"
                          ],
                          "description": "Whether CloudEvents 'binary' or 'structured' mode will be used"
                        },
                        "format": {
                          "name": "format",
                          "type": "string",
                          "description": "The media type format used to serialize the CloudEvent in the case of mode=structured"
                        },
                        "*": {
                          "name": "*",
                          "type": "any"
                        }
                      }
                    }
                  }
                }
              }
            },
            "protocol": {
              "name": "protocol",
              "description": "Protocol identifier. This attribute MUST be the same as the 'protocol' attribute of the definition group, but is not automatically inherited because definitions may be cross-referenced across groups",
              "type": "string",
              "ifvalues": {
                "AMQP/1.0": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "AMQP message metadata constraints",
                      "type": "object",
                      "namecharset": "extended",
                      "attributes": {
                        "properties": {
                          "name": "properties",
                          "description": "AMQP properties section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-properties",
                          "type": "object",
                          "namecharset": "extended",
                          "attributes": {
                            "message-id": {
                              "name": "message-id",
                              "description": "AMQP properties.message-id",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.message-id type constraint. The type values refer to the AMQP type model` and the defined message-id types",
                                  "type": "string",
                                  "enum": [
                                    "ulong",
                                    "uuid",
                                    "binary",
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.message-id value constraint. ",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.message-id required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "user-id": {
                              "name": "user-id",
                              "description": "AMQP properties.user-id",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.user-id value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "string",
                                  "enum": [
                                    "binary",
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.user-id value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.user-id required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "to": {
                              "name": "to",
                              "description": "AMQP properties.to",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.to value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "uritemplate",
                                  "enum": [
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.to value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.to required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "subject": {
                              "name": "subject",
                              "description": "AMQP properties.subject",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.subject value type",
                                  "type": "string",
                                  "enum" : [
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.subject value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.subject required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": true
                                }
                              }
                            },
                            "reply-to": {
                              "name": "reply-to",
                              "description": "AMQP properties.reply-to",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.reply-to value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "uritemplate",
                                  "enum": [
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.reply-to value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.reply-to required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "correlation-id": {
                              "name": "correlation-id",
                              "description": "AMQP properties.correlation-id",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP correlation-id value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "string",
                                  "enum": [
                                    "binary",
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP correlation-id value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP correlation-id required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "content-type": {
                              "name": "content-type",
                              "description": "AMQP properties.content-type",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.content-type value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "string",
                                  "enum": [
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.content-type value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.content-type required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "content-encoding": {
                              "name": "content-encoding",
                              "description": "AMQP properties.content-encoding",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.content-encoding value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "string",
                                  "enum" : ["string"]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.content-encoding value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.content-encoding required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "absolute-expiry-time": {
                              "name": "absolute-expiry-time",
                              "description": "AMQP properties.absolute-expiry-time",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.absolute-expiry-time value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "timestamp",
                                  "enum": [
                                    "timestamp"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.absolute-expiry-time value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.absolute-expiry-time required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "creation-time": {
                              "name": "creation-time",
                              "description": "AMQP properties.creation-time",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.creation-time value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "timestamp",
                                  "enum": [
                                    "timestamp"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.creation-time value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.creation-time required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "group-id": {
                              "name": "group-id",
                              "description": "AMQP properties.group-id",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.group-id value type",
                                  "type": "string",
                                  "required": true,
                                  "default": "string",
                                  "enum": [
                                    "string",
                                    "uritemplate"
                                  ]
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.group-id value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.group-id required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "group-sequence": {
                              "name": "group-sequence",
                              "description": "AMQP group-sequence",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP group-sequence value type",
                                  "type": "string",
                                  "enum": [
                                    "integer"
                                  ],
                                  "required": true,
                                  "default": "integer"
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP group-sequence value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP group-sequence required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            },
                            "reply-to-group-id": {
                              "name": "reply-to-group-id",
                              "description": "AMQP properties.reply-to-group-id",
                              "type": "object",
                              "attributes": {
                                "description": {
                                  "name": "description",
                                  "type": "string"
                                },
                                "type": {
                                  "name": "type",
                                  "description": "AMQP properties.reply-to-group-id value type",
                                  "type": "string",
                                  "enum": [
                                    "string",
                                    "uritemplate"
                                  ],
                                  "required": true,
                                  "default": "string"
                                },
                                "value": {
                                  "name": "value",
                                  "description": "AMQP properties.reply-to-group-id value constraint",
                                  "type": "string"
                                },
                                "required": {
                                  "name": "required",
                                  "description": "AMQP properties.reply-to-group-id required",
                                  "type": "boolean",
                                  "required": true,
                                  "default": false
                                }
                              }
                            }
                          }
                        },
                        "application-properties": {
                          "name": "application-properties",
                          "type": "map",
                          "description": "AMQP application-properties section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-application-properties",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "type": {
                                "name": "type",
                                "description": "The application property type",
                                "type": "string",
                                "enum": [
                                  "string",
                                  "uritemplate",
                                  "integer",
                                  "number",
                                  "boolean"
                                ],
                                "required": true,
                                "default": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "Application property value",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "Application property required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        },
                        "message-annotations": {
                          "name": "message-annotations",
                          "type": "map",
                          "description": "AMQP message-annotations section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-message-annotations",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "type": {
                                "name": "type",
                                "description": "The message annotation type",
                                "type": "string",
                                "enum": [
                                  "string",
                                  "uritemplate",
                                  "integer",
                                  "number",
                                  "boolean"
                                ],
                                "required": true,
                                "default": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "Annotation value constraint",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "Annotation required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        },
                        "delivery-annotations": {
                          "name": "delivery-annotations",
                          "type": "map",
                          "description": "AMQP delivery-annotations section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-delivery-annotations",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "type": {
                                "name": "type",
                                "description": "The annotation type",
                                "type": "string",
                                "enum": [
                                  "string",
                                  "uritemplate",
                                  "integer",
                                  "number",
                                  "boolean"
                                ],
                                "required": true,
                                "default": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "Annotation value constraint",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "Annotation required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        },
                        "header": {
                          "name": "header",
                          "type": "object",
                          "namecharset": "extended",
                          "description": "AMQP header section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-header",
                          "attributes": {
                            "durable": {
                              "name": "durable",
                              "description": "AMQP durable flag",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            },
                            "priority": {
                              "name": "priority",
                              "description": "AMQP priority",
                              "type": "integer",
                              "required": true,
                              "default": 4
                            },
                            "ttl": {
                              "name": "ttl",
                              "description": "AMQP time-to-live (milliseconds)",
                              "type": "integer"
                            },
                            "first-acquirer": {
                              "name": "first-acquirer",
                              "description": "AMQP first-acquirer flag",
                              "type": "boolean",
                              "required": true,
                              "default": false
                            },
                            "delivery-count": {
                              "name": "delivery-count",
                              "description": "AMQP delivery-count",
                              "type": "integer",
                              "required": true,
                              "default": 0
                            }
                          }
                        },
                        "footer": {
                          "name": "footer",
                          "type": "map",
                          "description": "AMQP footer section https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-messaging-v1.0-os.html#type-footer",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "type": {
                                "name": "type",
                                "description": "AMQP footer type",
                                "type": "string",
                                "enum": [
                                  "string",
                                  "uritemplate",
                                  "integer",
                                  "number",
                                  "boolean"
                                ],
                                "required": true,
                                "default": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "Footer value constraint",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "Footer required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                },
                "MQTT/3.1.1": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "MQTT message metadata constraints",
                      "type": "object",
                      "namecharset": "extended",
                      "attributes": {
                        "qos": {
                          "name": "qos",
                          "description": "MQTT QoS level",
                          "type": "integer"
                        },
                        "retain": {
                          "name": "retain",
                          "description": "MQTT retain flag",
                          "type": "boolean"
                        },
                        "topic_name": {
                          "name": "topic_name",
                          "description": "MQTT topic name",
                          "type": "uritemplate"
                        }
                      }
                    }
                  }
                },
                "MQTT/5.0": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "MQTT message metadata constraints",
                      "type": "object",
                      "attributes": {
                        "qos": {
                          "name": "qos",
                          "description": "MQTT QoS level",
                          "type": "integer"
                        },
                        "retain": {
                          "name": "retain",
                          "description": "MQTT retain flag",
                          "type": "boolean"
                        },
                        "topic_name": {
                          "name": "topic_name",
                          "description": "MQTT topic name",
                          "type": "uritemplate"
                        },
                        "payload_format_indicator": {
                          "name": "payload_format_indicator",
                          "description": "MQTT payload format indicator",
                          "type": "integer",
                          "enum": [
                            0,
                            1
                          ]
                        },
                        "message_expiry_interval": {
                          "name": "message_expiry_interval",
                          "description": "MQTT message expiry interval",
                          "type": "integer"
                        },
                        "response_topic": {
                          "name": "response_topic",
                          "description": "MQTT response topic",
                          "type": "uritemplate"
                        },
                        "correlation_data": {
                          "name": "correlation_data",
                          "description": "MQTT correlation data",
                          "type": "uritemplate"
                        },
                        "content_type": {
                          "name": "content_type",
                          "description": "MQTT content type",
                          "type": "uritemplate"
                        },
                        "user_properties": {
                          "name": "user_properties",
                          "description": "MQTT user properties",
                          "type": "array",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "name": {
                                "name": "name",
                                "description": "MQTT user property name",
                                "type": "string",
                                "required": true
                              },
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "MQTT user property value constraint",
                                "type": "string"
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                },
                "KAFKA": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "Apache Kafka message metadata constraints",
                      "type": "object",
                      "attributes": {
                        "topic": {
                          "name": "topic",
                          "description": "The Apache Kafka topic",
                          "type": "uritemplate"
                        },
                        "partition": {
                          "name": "partition",
                          "description": "The Apache Kafka partition",
                          "type": "integer"
                        },
                        "key": {
                          "name": "key",
                          "description": "The Apache Kafka key as a UTF-8 uri template. Mutually exclusive with 'key_base64'",
                          "type": "uritemplate"
                        },
                        "key_base64": {
                          "name": "key_base64",
                          "description": "Binary Apache Kafka key as a base64 encoded string. Mutually exclusive with 'key'",
                          "type": "string"
                        },
                        "headers": {
                          "name": "headers",
                          "description": "The Apache Kafka headers",
                          "type": "map",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "name": {
                                "name": "name",
                                "description": "Kafka header name",
                                "type": "string",
                                "required": true
                              },
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "Kafka header value constraint",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "Kafka header required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                },
                "HTTP": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "The HTTP message metadata constraints",
                      "type": "object",
                      "attributes": {
                        "headers": {
                          "name": "headers",
                          "description": "The HTTP headers",
                          "type": "array",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "name": {
                                "name": "name",
                                "description": "The HTTP header name",
                                "type": "string",
                                "required": true
                              },
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "The HTTP header value",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "The HTTP header required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        },
                        "query": {
                          "name": "query",
                          "description": "The HTTP query parameters",
                          "type": "array",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "name": {
                                "name": "name",
                                "description": "The HTTP query parameter",
                                "type": "string",
                                "required": true
                              },
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "The HTTP query parameter value",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "The HTTP query parameter required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        },
                        "path": {
                          "name": "path",
                          "description": "The HTTP path as a uri template",
                          "type": "uritemplate"
                        },
                        "method": {
                          "name": "method",
                          "description": "The HTTP method",
                          "type": "string"
                        }
                      }
                    }
                  }
                },
                "NATS": {
                  "siblingattributes": {
                    "protocoloptions": {
                      "name": "protocoloptions",
                      "description": "NATS message metadata constraints",
                      "type": "object",
                      "namecharset": "extended",
                      "attributes": {
                        "subject": {
                          "name": "subject",
                          "description": "The NATS subject",
                          "type": "uritemplate"
                        },
                        "reply": {
                          "name": "reply",
                          "description": "The NATS reply subject",
                          "type": "uritemplate"
                        },
                        "headers" : {
                          "name": "headers",
                          "description": "The NATS headers",
                          "type": "array",
                          "item": {
                            "type": "object",
                            "attributes": {
                              "name": {
                                "name": "name",
                                "description": "The NATS header name",
                                "type": "string"
                              },
                              "description": {
                                "name": "description",
                                "type": "string"
                              },
                              "value": {
                                "name": "value",
                                "description": "The NATS header value",
                                "type": "string"
                              },
                              "required": {
                                "name": "required",
                                "description": "The NATS header required",
                                "type": "boolean",
                                "required": true,
                                "default": false
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            },
            "dataschemaformat": {
              "name": "dataschemaformat",
              "description": "The schema format applicable to the message payload, equivalent to the 'format' attribute of the schema registry",
              "type": "string"
            },
            "dataschema": {
              "name": "dataschema",
              "description": "The inline schema for the message payload, equivalent to the 'schema' attribute of the schema registry",
              "type": "any"
            },
            "dataschemauri": {
              "name": "dataschemauri",
              "description": "The URI of the schema for the message payload, equivalent to the 'schemauri' attribute of the schema registry",
              "type": "uri"
            },
            "datacontenttype": {
              "name": "datacontenttype",
              "description": "The content type for the message payload",
              "type": "string"
            }
          }
        }
      }
    }
  }
}