This example demonstrates a minimal HTML page that displays the text "Hello HTML!" as a large heading. The page’s entire structure is defined in a single `index.html` file using standard HTML elements: the `<!DOCTYPE html>` declaration, a `<head>` section with a page title, and a `<body>` containing an `<h1>` tag. The code relies purely on vanilla HTML, with no external libraries or JavaScript, and no data source or rendering engine beyond the browser’s built-in parsing of the markup.