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Better answer regarding HTML 4’s case-insensitivity #33

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oli commented

Clarifying lowercase comment re: (Triynko’s comments on the question)

@paulirish paulirish merged commit e95b48d into paulirish:master
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@@ -311,8 +311,7 @@ <h1 id="intervention"><b>W3Schools</b> An Intervention</h1>
W3Schools use lowercase tags because the World Wide Web Consortium (W3C) recommends lowercase in HTML 4
- Incorrect. W3C's HTML 4.01 Specification defines nothing about it and uses uppercase tags.
- The current draft of HTML 5 specification allows mixed use for the HTML mode (with documents served as text/html).
+ Incorrect. W3C's HTML 4.01 Specification specifically says <a href="">element and attribute names are case-insensitive</a>, and uses uppercase tags to differentiate them from attributes. While XML-based XHTML 1.x and XHTML5 require lowercase tags, HTML5 is also case-insensitive.
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