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<details> <summary>What is HTML5?</summary> <p>HTML5 is the fifth revision of the HTML standard, introducing new semantic elements, form controls, APIs, and multimedia support.</p> </details> <details open> <summary>Getting Started</summary> <ol> <li>Install a text editor</li> <li>Create an index.html file</li> <li>Open it in a browser</li> </ol> </details>
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