This document defines a mechanism which allows authors to instruct a user agent to upgrade a priori insecure resource requests to secure transport before fetching them.
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This document was published by the Web Application Security Working Group as a Candidate Recommendation. This document is intended to become a W3C Recommendation. This document will remain a Candidate Recommendation at least until 8 November 2015 in order to ensure the opportunity for wide review.
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Publication as a Candidate Recommendation does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.
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