HTML
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Basics
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HTML is designed for marking up text by adding tags such as &lt;p&gt; to create HTML elements. HTML tags begin with &lt; and end with &gt;. Tags often occur in pairs of opening and closing tags. Some tags such as &lt;img&gt; always occur alone. Those tags usually (but not required to) have trailing slash.
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Tags can have attributes. For example, &lt;a&gt; tag has href attribute for defining link target. Similarly, &lt;img&gt; tag has src attribute for defining image source.