{
  "$id": "lesson-item.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": true,
  "$ref": "contentitem.schema.json",
  "required": [ "type", "fileref", "order" ],
  "title": "Lesson Items",
  "type": "object",
  "description": "Lesson Hierarchy Component in CTK",
  "properties": {
    "type": {
      "type": "string",
      "enum": [ "activity", "assignment", "pool", "formativeassessment", "assessment" ],
      "description": "Type of lesson item"
    },
    "fileref": {
      "type": "string",
      "minLength": 1,
      "description": "relative location of JSON File"
    },
    "order": {
      "type": "integer",
      "minimum": 0,
      "description": "Order of lesson items under lesson"
    }
  }
}