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CancanIT Websites Markup Validation Research

HTML&XML 2013 MARKUP VALIDATION RESEARCH ACROSS THE WEB Here is the results of the modest research, that was held by CancanIT team in July 2013. Our research held for about 2,5 million most popular Internet websites to determine the actual statistics and dependencies of HTML markup validity on various websites quality factors. CANCANTT! Firstly, we were interested to know how HTML markup validity correlates with website authority metrics. For this this research we have chosen Google PageRank: Valid HTML/XHTML Websites Percentage Valid websites, % 69 67 65 63 61 2 4 CancanIT Data provided by 10 PageRank Then, we have calculated the analogous data according to website popularity. Here we used Alexa Traffic Rank as a key metric: Valid HTML/XHTML Websites Percentage Valid websites, % 82 CancanIT Data provided by 74 66 58 50 1000 5000 10000 50000 100000 200000 300000 500000 1000000 >100000 Alexa Traffic Rank To make our research results as much accurate as possible, we have applied several filtering algorithms to our source database to sort out domains, which have "glued" PageRank metrics and use some other black-hat SEO tricks. Fetching validation stats with this domains gave us much higher percentage rates of invalid websites, which may indicate that the W3C standards compliance is still a good sign of the quality website. Some notes about used methods: - In our research we have equated "website's HTML markup validity" to website's homepage markup validity to be able to fetch high amounts of pages. CANCANT T! According to Alexa Traffic Rank algorithms, only second-level domains were counted in the second part of the research.

CancanIT Websites Markup Validation Research

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"The infographics is dedicated to the problem of websites markup standards compliance over the web. http://cancanit.com/ Enjoy!"

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CancanIT

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Technology
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