{
  "type": "array",
  "title": "HLS Chapter Data",
  "description": "HLS chapter data format",
  "$schema": "http://json-schema.org/draft-04/schema#",
  "items": {
    "type": "object",
    "description": "chapter entry",
    "required": ["start-time"],
    "properties": {
      "chapter": {
        "type": "number",
        "minimum": 1,
        "description": "Chapter number (optional)"
      },
      "start-time": {
        "type": "number",
        "minimum": 0,
        "description": "Chapter start time"
      },
      "duration": {
        "type": "number",
        "minimum": 0,
        "exclusiveMinimum": true,
        "description": "Chapter duration (optional)"
      },
      "titles": {
        "type": "array",
        "description": "List of titles by language for chapter (optional)",
        "items": {
          "type": "object",
          "description": "Title object",
          "required": [
            "language",
            "title"
          ],
          "properties": {
            "language": {
              "type": "string",
              "description": "BCP 47 language code; und for undefined"
            },
            "title": {
              "type": "string",
              "description": "Chapter title string"
            }
          }
        }
      },
      "images": {
        "type": "array",
        "description": "List of images for chapter (optional)",
        "items": {
          "type": "object",
          "description": "Image object",
          "required": [
            "image-category",
            "pixel-width",
            "pixel-height",
            "url"
          ],
          "properties": {
            "image-category": {
              "type": "string",
              "description": "Image category"
            },
            "pixel-width": {
              "type": "integer",
              "minimum": 0,
              "exclusiveMinimum": true,
              "description": "Pixel width"
            },
            "pixel-height": {
              "type": "integer",
              "minimum": 0,
              "exclusiveMinimum": true,
              "description": "Pixel height"
            },
            "url": {
              "type": "string",
              "description": "URL to image (relative or absolute)"
            }
          }
        }
      },
      "metadata": {
        "type": "array",
        "description": "List of metadata entries for chapter (optional)",
        "items": {
          "type": "object",
          "description": "Metadata object",
          "required": [
            "key",
            "value"
          ],
          "properties": {
            "key": {
              "type": "string",
              "description": "Key value name"
            },
            "value": {
              "description": "Metadata value",
              "anyOf": [
                {"type": "string"},
                {"type": "number"},
                {"type": "boolean"},
                {"type": "array"},
                {"type": "object"}
              ]
            },
            "language": {
              "type": "string",
              "description": "BCP 47 language code (optional)"
            }
          }
        }
      }
    }
  }
}