– Mark Amery Jan 14 '14 at 11:16 Obsolete or experimental tags, attributes, and uses, are excluded. Nope, that’s the whole point. Ex: Single page websites. Use them only for highlighting the heading of your document and to show the document structure. You’re free to use the solidus in the HTML serialization of HTML5. For example, you could embed a music video on your web page for your visitors to listen to and watch. Which of the following tags are no longer valid in HTML5? HTML5 section, aside, header, nav, footer elements – Not as obvious as they sound. This set of MCQ questions on the fundamentals of HTML and XHTML includes MCQ questions on HTML markup elements. According to W3C's HTML documentation: "A section is a thematic grouping of content, typically with a heading." This HTML tutorial explains how to use the HTML element called the body tag with syntax and examples. Use abbr instead. Currently only Firefox 8.0 browser (for context menus) is support tag and all latest browsers are not suppoting tag. Don't use headings to make your text look BIG or bold. Complete list of html 5 tags listed alphabetically. Browser support HTML 5 (aka HTML5) is the next version up from HTML 4.01 How to write HTML headings tags? They are h1, h2, h3, h4, h5 and h6, h1 being the almighty emperor of headings and h6 being the lowest pleb. The HTML 5