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Last call, candidacy, and recommendation stages

On 14 February 2011, the W3C extended the charter of its HTML Working Group with clear milestones for HTML 5. In May 2011, the working group advanced HTML 5 to "Last Call", an invitation to communities inside and outside W3C to confirm the technical soundness of the specification. The W3C developed a comprehensive test suite to achieve broad interoperability for the full specification by 2014, which was the target date for recommendation.[28] In January 2011, the WHATWG renamed its "HTML5" specification HTML Living Standard". The W3C nevertheless continued its project to release HTML 5.[29]

In July 2012, WHATWG and W3C decided on a degree of separation. W3C will continue the HTML 5 specification work, focusing on a single definitive standard, which is considered as a "snapshot" by WHATWG. The WHATWG organization continues its work with HTML 5 as a "living standard". The concept of a living standard is that it is never complete and is always being updated and improved. New features can be added but functionality will not be removed.[30]

In December 2012, W3C designated HTML 5 as a Candidate Recommendation.[31] The criterion for advancement to W3C Recommendation is "two 100% complete and fully interoperable implementations".[32]

On 16 September 2014, W3C moved HTML 5 to Proposed Recommendation.[33] On 28 October 2014, HTML 5 was released as a W3C Recommendation,[34] bringing the specification process to completion.[2] On 1 November 2016, HTML 5.1 was released as a W3C Recommendation.[35] On 14 December 2017, HTML 5.2 was released as a W3C Recommendation.[36]

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