{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://developer.microsoft.com/schemas/windows-10/ml-model.json",
  "title": "Windows 10 Machine Learning Model",
  "description": "Schema for Windows ML machine learning models and evaluation results as defined by the Windows.AI.MachineLearning namespace. Covers LearningModel, LearningModelSession, LearningModelBinding, feature descriptors, and evaluation results.",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Model name from ONNX metadata"
    },
    "author": {
      "type": "string",
      "description": "Model author"
    },
    "domain": {
      "type": "string",
      "description": "Model domain (e.g., image classification, NLP)"
    },
    "description": {
      "type": "string",
      "description": "Model description"
    },
    "version": {
      "type": "integer",
      "description": "Model version number"
    },
    "inputFeatures": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/FeatureDescriptor"
      },
      "description": "Input feature descriptors"
    },
    "outputFeatures": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/FeatureDescriptor"
      },
      "description": "Output feature descriptors"
    },
    "metadata": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      },
      "description": "Custom metadata key-value pairs from the ONNX model"
    }
  },
  "required": ["name", "inputFeatures", "outputFeatures"],
  "$defs": {
    "FeatureDescriptor": {
      "type": "object",
      "description": "Describes an input or output feature of a model (ILearningModelFeatureDescriptor)",
      "properties": {
        "name": {
          "type": "string",
          "description": "Feature name"
        },
        "description": {
          "type": "string",
          "description": "Feature description"
        },
        "kind": {
          "type": "string",
          "enum": ["Tensor", "Sequence", "Map", "Image"],
          "description": "Feature kind (LearningModelFeatureKind)"
        },
        "isRequired": {
          "type": "boolean",
          "description": "Whether the feature is required for evaluation"
        },
        "tensorDescriptor": {
          "$ref": "#/$defs/TensorFeatureDescriptor"
        },
        "imageDescriptor": {
          "$ref": "#/$defs/ImageFeatureDescriptor"
        },
        "mapDescriptor": {
          "$ref": "#/$defs/MapFeatureDescriptor"
        },
        "sequenceDescriptor": {
          "$ref": "#/$defs/SequenceFeatureDescriptor"
        }
      },
      "required": ["name", "kind"]
    },
    "TensorFeatureDescriptor": {
      "type": "object",
      "description": "Descriptor for tensor features (TensorFeatureDescriptor class)",
      "properties": {
        "tensorKind": {
          "type": "string",
          "enum": [
            "Undefined", "Float", "UInt8", "Int8", "UInt16", "Int16",
            "Int32", "Int64", "String", "Boolean", "Float16", "Double",
            "UInt32", "UInt64", "Complex64", "Complex128"
          ],
          "description": "Tensor element data type (TensorKind)"
        },
        "shape": {
          "type": "array",
          "items": {
            "type": "integer"
          },
          "description": "Tensor dimensions (-1 for variable dimensions)"
        }
      },
      "required": ["tensorKind", "shape"]
    },
    "ImageFeatureDescriptor": {
      "type": "object",
      "description": "Descriptor for image features (ImageFeatureDescriptor class)",
      "properties": {
        "bitmapAlphaMode": {
          "type": "string",
          "enum": ["Premultiplied", "Straight", "Ignore"],
          "description": "Alpha channel mode"
        },
        "bitmapPixelFormat": {
          "type": "string",
          "enum": ["Unknown", "Rgba16", "Rgba8", "Gray16", "Gray8", "Bgra8", "Nv12", "P010", "Yuy2"],
          "description": "Pixel format"
        },
        "height": {
          "type": "integer",
          "description": "Image height in pixels"
        },
        "width": {
          "type": "integer",
          "description": "Image width in pixels"
        }
      },
      "required": ["bitmapPixelFormat", "height", "width"]
    },
    "MapFeatureDescriptor": {
      "type": "object",
      "description": "Descriptor for map features (MapFeatureDescriptor class)",
      "properties": {
        "keyKind": {
          "type": "string",
          "enum": ["Float", "Int64", "String", "Double"],
          "description": "Map key data type"
        },
        "valueDescriptor": {
          "$ref": "#/$defs/FeatureDescriptor"
        }
      },
      "required": ["keyKind"]
    },
    "SequenceFeatureDescriptor": {
      "type": "object",
      "description": "Descriptor for sequence features (SequenceFeatureDescriptor class)",
      "properties": {
        "elementDescriptor": {
          "$ref": "#/$defs/FeatureDescriptor"
        }
      }
    },
    "EvaluationResult": {
      "type": "object",
      "description": "Result of a model evaluation (LearningModelEvaluationResult class)",
      "properties": {
        "correlationId": {
          "type": "string",
          "description": "Correlation identifier for tracking"
        },
        "errorStatus": {
          "type": "integer",
          "description": "Error status code (0 for success)"
        },
        "succeeded": {
          "type": "boolean",
          "description": "Whether evaluation succeeded"
        },
        "outputs": {
          "type": "object",
          "additionalProperties": true,
          "description": "Map of output feature names to their values"
        }
      },
      "required": ["succeeded"]
    },
    "LearningModelDevice": {
      "type": "object",
      "description": "Device used for model evaluation (LearningModelDevice class)",
      "properties": {
        "deviceKind": {
          "type": "string",
          "enum": ["Default", "Cpu", "DirectX", "DirectXHighPerformance", "DirectXMinPower"],
          "description": "Device type (LearningModelDeviceKind)"
        },
        "adapterId": {
          "type": "object",
          "properties": {
            "highPart": { "type": "integer" },
            "lowPart": { "type": "integer" }
          },
          "description": "GPU adapter identifier (for DirectX devices)"
        }
      },
      "required": ["deviceKind"]
    }
  }
}