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HTTP/2 301
date: Fri, 10 Oct 2025 05:25:09 GMT
content-type: text/html
content-length: 167
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HTTP/2 200
date: Fri, 10 Oct 2025 05:25:09 GMT
content-type: text/html; charset=UTF-8
content-encoding: gzip
cache-control: max-age=0, public, s-maxage=3600
access-control-allow-origin: *
last-modified: Thu, 09 Oct 2025 22:05:52 GMT
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content-security-policy: frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests
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cf-ray: 98c3b20d68cfc1f7-BLR
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HTML Ruby Markup Extensions publication history | Standards | W3C
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