{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/apv022/mcf-spec/master/schemas/1.1/lesson-frontmatter.schema.json",
  "title": "MCF 1.1 lesson frontmatter",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "id",
    "title"
  ],
  "properties": {
    "id": {
      "$ref": "common.schema.json#/$defs/id"
    },
    "title": {
      "$ref": "common.schema.json#/$defs/nonEmptyString"
    },
    "description": {
      "type": "string"
    },
    "authors": {
      "type": "array",
      "minItems": 1,
      "items": {
        "$ref": "common.schema.json#/$defs/nonEmptyString"
      }
    },
    "license": {
      "$ref": "common.schema.json#/$defs/nonEmptyString"
    },
    "subjects": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "common.schema.json#/$defs/nonEmptyString"
      }
    },
    "keywords": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "common.schema.json#/$defs/nonEmptyString"
      }
    },
    "level": {
      "$ref": "common.schema.json#/$defs/level"
    },
    "estimated_duration": {
      "$ref": "common.schema.json#/$defs/duration"
    },
    "prerequisites": {
      "type": "array",
      "items": {
        "$ref": "common.schema.json#/$defs/prerequisite"
      }
    },
    "learning_outcomes": {
      "type": "array",
      "items": {
        "$ref": "common.schema.json#/$defs/learningOutcome"
      }
    },
    "rubrics": {
      "type": "array",
      "items": {
        "$ref": "common.schema.json#/$defs/rubric"
      }
    },
    "completion": {
      "$ref": "common.schema.json#/$defs/completion"
    },
    "relationships": {
      "type": "array",
      "items": {
        "$ref": "common.schema.json#/$defs/relationship"
      }
    },
    "extensions": {
      "$ref": "common.schema.json#/$defs/extensions"
    }
  }
}