{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://cdn.jsdelivr.net/npm/@pie-element/select-text@14.0.6/dist/schemas/session.schema.json",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Identifier of the session"
    },
    "element": {
      "type": "string",
      "description": "The element the session belongs to"
    },
    "selectedTokens": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/TextToken"
      },
      "description": "The tokens the student selected"
    }
  },
  "definitions": {
    "TextToken": {
      "type": "object",
      "properties": {
        "text": {
          "type": "string",
          "description": "The token text"
        },
        "start": {
          "type": "number",
          "description": "The start point in the main text for this token"
        },
        "end": {
          "type": "number",
          "description": "The end point in the main text for this token"
        },
        "correct": {
          "type": "boolean",
          "description": "Is selected does the token represent a correct response"
        },
        "oldStart": {
          "type": "number",
          "description": "The start point before the author re-parsed the text; scoring matches a selection on either position"
        },
        "oldEnd": {
          "type": "number",
          "description": "The end point before the author re-parsed the text; scoring matches a selection on either position"
        }
      },
      "required": [
        "start",
        "end"
      ],
      "description": "A selectable span of the main text"
    }
  }
}