{ "$schema":                              "https://json-schema.org/draft/2020-12/schema",
  "$id":                                  "https://schemas.mpai.community/OSD/V1.5/data/SpeechSceneDescriptors.json",
  "title":                                "Speech Scene Descriptors V1.5",
  "description":                          "A Data Type including the Speech Objects of a scene, their Sub-Scenes, and their arrangement in the Scene.",
  "type":                                 "object",
  "additionalProperties":                 false,
  "required":                             [ "Header", "SpeechSceneDescriptorsID", "SpeechSceneDescriptorsSpaceTime" ],
  "properties":                           {

    "Header":                             { "type": "string", "pattern": "^OSD-SSD-V[0-9]{1,2}[.][0-9]{1,2}$", "description": "Speech Scene Descriptors Header – Standard OSD-SSD-Vx.y." },
    "MInstanceID":                        { "type": "string", "description": "Identifier of the M-Instance." },
    "EnvironmentID":                      { "type": "string", "description": "Identifier of the U-Environment." },
    "SpeechSceneDescriptorsID":           { "type": "string", "description": "ID of this Speech Scene Descriptors instance." },
    "SpeechSceneDescriptorsSpaceTime":    { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json", "description": "Space and Time of Speech Scene Descriptors instance." },

    "ObjectCount":                        { "type": "integer", "description": "Number of Speech Objects in Speech Scene." },
    "Objects":                            { "type": "array", "description": "Set of Data related to Speech Objects in the Speech Scene.",
                                            "items": { "type": "object",
                                            "additionalProperties": false, "properties": {
      "ObjectSpaceTime":                  { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json", "description": "Space and Time of Speech Object in the Speech Scene." },
      "ObjectIDOrObject":                 { "$ref": "#/$defs/ObjectIDOrObject", "description": "Basic Speech Object in the Scene." } } } },

    "SubSpeechSceneCount":                { "type": "integer", "description": "Number of Speech Sub-Scenes in Speech Scene." },
    "SubSpeechScenes":                    { "type": "array", "description": "Set of Data related to Speech Sub-Scenes in the Scene.",
                                            "items": { "type": "object",
                                            "additionalProperties": false, "properties": {
      "SubSpeechSceneSpaceTime":          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json", "description": "Space and Time of Speech Object in the Scene." },
      "SubSpeechSceneIDOrSubSpeechScene": { "$ref": "#/$defs/SubSpeechSceneIDOrSubSpeechScene" } } } },

    "BasicSpeechSceneOrSpeechScene":      { "$ref": "#/$defs/BasicSpeechSceneOrSpeechScene" },

    "DataXMData":                         { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/DataExchangeMetadata.json", "description": "MPAI-PTF Data Exchange Metadata providing provenance, authorisation, legal, security, and confidence information associated with this Speech Scene Descriptors instance in a trusted data exchange context." },
    "DescrMetadata":                      { "type": "string", "maxLength": 2048, "description": "Human-readable descriptive metadata of the Speech Scene Descriptors instance (plain text, max 2048 characters)." } },

  "$defs":                                {

    "ObjectIDOrObject":                   { "type": "array", "minItems": 1, "maxItems": 1, "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpeechObject.json" },
                                          { "type": "string" } ] } },

    "SubSpeechSceneIDOrSubSpeechScene":   { "type": "array", "minItems": 1, "maxItems": 1, "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpeechSceneDescriptors.json" },
                                          { "type": "string" } ] } },

    "BasicSpeechSceneOrSpeechScene":      { "type": "array", "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/BasicSpeechSceneDescriptors.json" },
                                          { "$ref": "#/$defs/BasicSpeechSceneOrSpeechScene" } ] } } } }