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🔍 Is W3.org Legit Or Scam? WebParanoid🛡️
Hackers are using your website http://validator.w3.org/ from Romain C on 2020-11-22 (www-validator@w3.org from November 2020)
Why <html xmlns="http://www.w3.org/1999/xhtml"> is recommended
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61. Create and Validate an XHTML 1.0 Document - XML Hacks [Book]
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Sistem ve Ağ Uzmanlığı
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PPT - <html xmlns="w3/1999/xhtml" xml:lang="ru-RU" lang="ru-RU"> PowerPoint Presentation - ID:4098478
Dev.w3.org html5
Web topic 13 html validation tools | PPT
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warnings by validation for http://validator.w3.org from Serguei Zouikov on 2018-02-20 (www-validator@w3.org from February 2018)
Validating your HTML - W3C Wiki
