{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://dasp-protocol.github.io/dasp/schemas/draft-01/envelope.schema.json",
  "title": "DASP draft-01 structured CloudEvents",
  "description": "Structural draft constraints only. Authorization, retry equality, byte limits, and state transitions require behavioral validation.",
  "oneOf": [
    {
      "$ref": "#/$defs/session.openEvent"
    },
    {
      "$ref": "#/$defs/session.openedEvent"
    },
    {
      "$ref": "#/$defs/commandEvent"
    },
    {
      "$ref": "#/$defs/receiptEvent"
    },
    {
      "$ref": "#/$defs/updateEvent"
    },
    {
      "$ref": "#/$defs/progressEvent"
    },
    {
      "$ref": "#/$defs/view.readEvent"
    },
    {
      "$ref": "#/$defs/viewEvent"
    },
    {
      "$ref": "#/$defs/updates.readEvent"
    },
    {
      "$ref": "#/$defs/updatesEvent"
    },
    {
      "$ref": "#/$defs/outcome.readEvent"
    },
    {
      "$ref": "#/$defs/outcomeEvent"
    },
    {
      "$ref": "#/$defs/resync.requiredEvent"
    },
    {
      "$ref": "#/$defs/failureEvent"
    }
  ],
  "$defs": {
    "value": {
      "anyOf": [
        {
          "type": "null"
        },
        {
          "type": "boolean"
        },
        {
          "type": "string"
        },
        {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991
        },
        {
          "type": "array",
          "items": {
            "$ref": "#/$defs/value"
          }
        },
        {
          "type": "object",
          "additionalProperties": {
            "$ref": "#/$defs/value"
          }
        }
      ]
    },
    "outcome": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "status": {
              "const": "completed"
            },
            "output": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/$defs/value"
              }
            },
            "error": {
              "const": null
            }
          },
          "required": [
            "status",
            "output",
            "error"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "status": {
              "enum": [
                "failed",
                "uncertain"
              ]
            },
            "output": {
              "anyOf": [
                {
                  "type": "object",
                  "additionalProperties": {
                    "$ref": "#/$defs/value"
                  }
                },
                {
                  "type": "null"
                }
              ]
            },
            "error": {
              "type": "object",
              "properties": {
                "code": {
                  "type": "string",
                  "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
                },
                "message": {
                  "type": "string"
                },
                "retryable": {
                  "type": "boolean"
                }
              },
              "required": [
                "code",
                "message",
                "retryable"
              ],
              "additionalProperties": false
            }
          },
          "required": [
            "status",
            "output",
            "error"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "status": {
              "const": "cancelled"
            },
            "output": {
              "anyOf": [
                {
                  "type": "object",
                  "additionalProperties": {
                    "$ref": "#/$defs/value"
                  }
                },
                {
                  "type": "null"
                }
              ]
            },
            "error": {
              "const": null
            }
          },
          "required": [
            "status",
            "output",
            "error"
          ],
          "additionalProperties": false
        }
      ]
    },
    "updateData": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "sequence": {
              "type": "integer",
              "minimum": 1,
              "maximum": 9007199254740991
            },
            "kind": {
              "const": "command.accepted"
            },
            "command_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "payload": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
                }
              },
              "required": [
                "name"
              ],
              "additionalProperties": false
            }
          },
          "required": [
            "session_id",
            "sequence",
            "kind",
            "command_id",
            "payload"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "sequence": {
              "type": "integer",
              "minimum": 1,
              "maximum": 9007199254740991
            },
            "kind": {
              "const": "command.outcome"
            },
            "command_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "payload": {
              "$ref": "#/$defs/outcome"
            }
          },
          "required": [
            "session_id",
            "sequence",
            "kind",
            "command_id",
            "payload"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "sequence": {
              "type": "integer",
              "minimum": 1,
              "maximum": 9007199254740991
            },
            "kind": {
              "const": "application"
            },
            "command_id": {
              "anyOf": [
                {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                {
                  "type": "null"
                }
              ]
            },
            "payload": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
                },
                "data": {
                  "type": "object",
                  "additionalProperties": {
                    "$ref": "#/$defs/value"
                  }
                }
              },
              "required": [
                "name",
                "data"
              ],
              "additionalProperties": false
            }
          },
          "required": [
            "session_id",
            "sequence",
            "kind",
            "command_id",
            "payload"
          ],
          "additionalProperties": false
        }
      ]
    },
    "session.openEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.session.open"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "actor_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "profile": {
              "type": "object",
              "properties": {
                "id": {
                  "type": "string",
                  "format": "uri"
                },
                "version": {
                  "type": "string",
                  "minLength": 1
                }
              },
              "required": [
                "id",
                "version"
              ],
              "additionalProperties": false
            }
          },
          "required": [
            "session_id",
            "actor_id",
            "profile"
          ],
          "additionalProperties": false
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data",
        "requestid"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "session.openedEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.session.opened"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "actor_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "profile": {
              "type": "object",
              "properties": {
                "id": {
                  "type": "string",
                  "format": "uri"
                },
                "version": {
                  "type": "string",
                  "minLength": 1
                }
              },
              "required": [
                "id",
                "version"
              ],
              "additionalProperties": false
            },
            "cursor": {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            }
          },
          "required": [
            "session_id",
            "actor_id",
            "profile",
            "cursor"
          ],
          "additionalProperties": false
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data",
        "requestid"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "commandEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.command"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "command_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "name": {
              "type": "string",
              "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
            },
            "input": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/$defs/value"
              }
            }
          },
          "required": [
            "session_id",
            "command_id",
            "name",
            "input"
          ],
          "additionalProperties": false
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data",
        "requestid"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "receiptEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.receipt"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "oneOf": [
            {
              "type": "object",
              "properties": {
                "session_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                "command_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                "disposition": {
                  "enum": [
                    "accepted",
                    "duplicate"
                  ]
                },
                "admission_sequence": {
                  "type": "integer",
                  "minimum": 1,
                  "maximum": 9007199254740991
                },
                "error": {
                  "const": null
                }
              },
              "required": [
                "session_id",
                "command_id",
                "disposition",
                "admission_sequence",
                "error"
              ],
              "additionalProperties": false
            },
            {
              "type": "object",
              "properties": {
                "session_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                "command_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                "disposition": {
                  "const": "rejected"
                },
                "admission_sequence": {
                  "const": null
                },
                "error": {
                  "type": "object",
                  "properties": {
                    "code": {
                      "type": "string",
                      "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
                    },
                    "message": {
                      "type": "string"
                    },
                    "retryable": {
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "code",
                    "message",
                    "retryable"
                  ],
                  "additionalProperties": false
                }
              },
              "required": [
                "session_id",
                "command_id",
                "disposition",
                "admission_sequence",
                "error"
              ],
              "additionalProperties": false
            }
          ]
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data",
        "requestid"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "updateEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.update"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "$ref": "#/$defs/updateData"
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "progressEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.progress"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "command_id": {
              "anyOf": [
                {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9._:-]{1,128}$"
                },
                {
                  "type": "null"
                }
              ]
            },
            "name": {
              "type": "string",
              "pattern": "^[a-z][a-z0-9_.-]{0,127}$"
            },
            "payload": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/$defs/value"
              }
            }
          },
          "required": [
            "session_id",
            "command_id",
            "name",
            "payload"
          ],
          "additionalProperties": false
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "view.readEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.view.read"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            }
          },
          "required": [
            "session_id"
          ],
          "additionalProperties": false
        },
        "subject": {
          "type": "string",
          "minLength": 1
        },
        "time": {
          "type": "string",
          "format": "date-time"
        },
        "dataschema": {
          "type": "string",
          "format": "uri"
        },
        "requestid": {
          "type": "string",
          "pattern": "^[A-Za-z0-9._:-]{1,128}$"
        }
      },
      "required": [
        "specversion",
        "id",
        "source",
        "type",
        "datacontenttype",
        "data",
        "requestid"
      ],
      "propertyNames": {
        "pattern": "^[a-z0-9]+$"
      },
      "additionalProperties": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "boolean"
          },
          {
            "type": "integer",
            "minimum": -2147483648,
            "maximum": 2147483647
          }
        ]
      }
    },
    "viewEvent": {
      "type": "object",
      "properties": {
        "specversion": {
          "const": "1.0"
        },
        "id": {
          "type": "string",
          "minLength": 1
        },
        "source": {
          "type": "string",
          "format": "uri"
        },
        "type": {
          "const": "dasp.v1.view"
        },
        "datacontenttype": {
          "const": "application/json"
        },
        "data": {
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "actor_id": {
              "type": "string",
              "pattern": "^[A-Za-z0-9._:-]{1,128}$"
            },
            "profile": {
              "type": "object",
              "properties": {
                "id": {
                  "type": "string",
                  "format": "uri"
                },
                "version": {
                  "type": "string",
                  "minLength": 1
                }
              },
              "required": [
                "id",
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