Alternative successions of the English and British crown of the "Clarence" claim also draw on the debated validity of Edward IV's marriage to Elizabeth Woodville, which allows them to argue that, even if Edward was legitimate, his children were not. Another point is that Henry VI passed a law in 1470 that should both he and his son Edward of Westminster die without further legitimate issue, the crown was to pass to "Clarence", as Henry had placed an attainder upon Edward IV. When Henry died in 1471 (Prince Edward having died in battle shortly before), "Clarence" (who could claim descent from John of Gaunt, as could his wife
IEEE 1471 Standards Board approved the specification as IEEE Std 1471-2000. In 2006, ISO/IEC Joint Technical Committee 1 (JTC1), Information technology/Subcommittee SC 7, Software and systems engineering, adopted the specification as ISO/IEC 42010, under a special "fast-track procedure", in parallel with its approval by national bodies of ISO and IEC. A coordinated revision of this standard by ISO/IEC JTC1/SC7/WG42 and IEEE CS commenced in 2006, following the successful ISO/IEC fast-track ballot and in line with the IEEE standard 5-year review of the standard. In November 2011, IEEE 1471-2000 and ISO/IEC 42010:2007 was superseded by ISO/IEC/IEEE 42010:2011, "Systems and software engineering — Architecture