References

The following referenced resources are indispensable for the application of this specification.

• "Experience API", version 1.0.3, ADL
  https://github.com/adlnet/xAPI-Spec/blob/xAPI-1.0.3/xAPI.md

• Internationalized Resource Identifiers (IRIs): IRI Syntax January 2005
  https://www.ietf.org/rfc/rfc3987.txt

• The JSON Data Interchange Format
  http://json.org/

• RFC 5646 Language Tags
  https://www.w3.org/International/articles/language-tags/