{ "$schema":                              "https://json-schema.org/draft/2020-12/schema",
  "$id":                                  "https://schemas.mpai.community/OSD/V1.5/data/3DModelSceneDescriptors.json",
  "title":                                "3D Model Scene Descriptors V1.5",
  "type":                                 "object",
  "required":                             [ "Header", "3DModelSceneDescriptorsID", "3DModelSceneDescriptorsSpaceTime" ],
  "additionalProperties":                 false,
  "properties":                           {

    "Header":                             { "type": "string", "pattern": "^OSD-3SD-V[0-9],{1,2},[.][0-9],{1,2}$" },
    "MInstanceID":                        { "type": "string" },
    "3DModelSceneDescriptorsID":          { "type": "string" },
    "3DModelSceneDescriptorsSpaceTime":   { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json" },

    "ObjectCount":                        { "type": "integer" },
    "Objects":                            { "type": "array", "items": { "type": "object",
                                            "additionalProperties": false, "properties": {
      "ObjectSpaceTime":                  { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json" },
      "ObjectIDOrObject":                 { "$ref": "#/$defs/ObjectIDOrObject" } } } },

    "Sub3DModelSceneCount":               { "type": "integer" },
    "Sub3DModelScenes":                   { "type": "array", "items": { "type": "object",
                                          "additionalProperties": false, "properties": {
      "Sub3DModelSceneSpaceTime":         { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/SpaceTime.json" },
      "Sub3DModelSceneIDOrSub3DModelScene":{ "$ref": "#/$defs/Sub3DModelSceneIDOrSub3DModelScene" } } } },

    "Basic3DModelSceneOr3DModelScene":    { "$ref": "#/$defs/Basic3DModelSceneOr3DModelScene" },

    "DataXMData":                         { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/DataExchangeMetadata.json" },
    "DescrMetadata":                      { "type": "string", "maxLength": 2048 } },

  "$defs":                                {
    "ObjectIDOrObject":                   { "type": "array", "minItems": 1, "maxItems": 1, "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/3DModelObject.json" },
                                          { "type": "string" } ] } },
    "Sub3DModelSceneIDOrSub3DModelScene": { "type": "array", "minItems": 1, "maxItems": 1, "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/3DModelSceneDescriptors.json" },
                                          { "type": "string" } ] } },
    "Basic3DModelSceneOr3DModelScene":    { "type": "array", "items": { "oneOf": [
                                          { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/Basic3DModelSceneDescriptors.json" },
                                          { "$ref": "#/$defs/Basic3DModelSceneOr3DModelScene" } ] } } } }