ical.js-one.com/test/parser/boolean.json

[](http://travis-ci.org/mozilla-comm/ical.js)

["icalendar",
  ["vcalendar",
    [
      [
        "x-true",
        {},
        "boolean",
        true
      ],
      [
        "x-false",
        {},
        "boolean",
        false
      ]
    ],
    []
  ]
]