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 List out the new features of HTML5? Some of the most interesting new features in HTML5: New Semantic Elements − These are like <header>, <footer>, and <section>. Forms 2.0 − Improvements to HTML web forms where new attributes have been introduced for <input> tag. Persistent Local Storage − To achieve without resorting to third-party plugins. WebSocket − A a next-generation bidirectional communication technology for web applications. Server-Sent Events − HTML5 introduces events which flow from a web server to the web browsers and they are called Server-Sent Events (SSE). Canvas − This supports a two-dimensional drawing surface that you can program with JavaScript. Audio & Video − You can embed audio or video on your web pages without resorting to third-party plugins. Geolocation − Now visitors can choose to share their physical location with your web application. Microdata − This lets you create your own vocabularies beyond HTML...

What is < !DOCTYPE>? Is it necessary to use in HTML5? The < !DOCTYPE> is an instruction to the web browser about what version of HTML the page is written in. AND The < !DOCTYPE> tag does not have an end tag and It is not case sensitive. The < !DOCTYPE> declaration must be the very first thing in HTML5 document, before the tag. As In HTML 4.01, all < ! DOCTYPE > declarations require a reference to a Document Type Definition (DTD), because HTML 4.01 was based on Standard Generalized Markup Language (SGML). Where as HTML5 is not based on SGML, and therefore does not require a reference to a Document Type Definition (DTD). The <!DOCTYPE html> declaration defines this document to be HTML5

Example of HTML 5 < !DOCTYPE   html > < html > < head > < title > Page Title < /title > < /head > < body > < h1 > This is a Heading < /h1 > < p > This is a paragraph. < /p > < /body > < / html >