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The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check HTML and XHTML documents for well-formed markup. Markup validation is an important step towards ensuring the technical quality of web pages; however, is not a complete measure of web standards conformance. -- Wikipedia

The W3C Markup Validation Service

W3C's easy-to-use markup validation service, based on SGML and XML parsers.
https://validator.w3.org/ - Details - Similar

HTML5 - Wikipedia

WHATWG's Ian Hickson (Google) and David Hyatt (Apple) produced W3C's first public working draft of the specification on 22 January 2008. 2
https://en.wikipedia.org/wiki/HTML5 - Details - Similar

CSS - Wikipedia

The name cascading comes from the specified priority scheme to determine which declaration applies if more than one declaration of a property match a particular element. This cascading priority scheme is predictable.
https://en.wikipedia.org/wiki/CSS3 - Details - Similar

Web design - Wikipedia

Since the start of the 21st century, the web has become more and more integrated into people's lives. As this has happened, the technology of the web has also continued to evolve. There have also been significant changes
https://en.wikipedia.org/wiki/Web_design - Details - Similar

Apache OpenOffice - Official Site - The Free and Open Productivity Sui

The official home page of the Apache OpenOffice open source project, home of OpenOffice Writer, Calc, Impress, Draw and Base.
http://openoffice.org/ - Details - Similar

Computer says NO to HTML5 document outline | HTML5 Doctor

How the outline should work: using nested section and h1 elements
http://html5doctor.com/computer-says-no-to-html5-document-outline/ - Details - Similar

Changing Company Name? Four Ways To Let Current Clients Know What s Co

/documents/WhitePapers/ represent folder levels within our website s Root Folder (aka: the main folder holding all of your web files that...
https://writeablog.net/battlebeaver90/changing-company-name-four-ways-to-let-current-clients-know-whats-coming - Details - Similar

The W3C CSS Validation Service

Check Cascading Style Sheets (CSS) and (X)HTML documents with style sheets
https://jigsaw.w3.org/css-validator/ - Details - Similar

The W3C CSS Validation Service

Check Cascading Style Sheets (CSS) and (X)HTML documents with style sheets
https://jigsaw.w3.org/css-validator - Details - Similar

W3C Feed Validation Service, for Atom and RSS

Check the syntax of Atom or RSS feeds
https://validator.w3.org/feed/ - Details - Similar

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