1.2.1 Normative References

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[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997, http://www.rfc-editor.org/rfc/rfc2119.txt

[WAI-ARIA1.0] World Wide Web Consortium, "Accessible Rich Internet Applications (WAI-ARIA) 1.0", W3C Recommendation 20 March 2014, http://www.w3.org/TR/2014/REC-wai-aria-20140320/