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<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>scheme — legacy meta</title>

  <meta name=identifier scheme=ISBN content=978-0134685991>

  <meta name=DC.date scheme=DCTERMS.W3CDTF content=2025-08-22>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 1rem;font-size:1.25rem;color:#0f172a}.warn{max-width:520px;padding:.75rem 1rem;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;font-size:.8125rem;color:#92400e;margin-bottom:1rem}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}ul{max-width:520px;padding-left:1.25rem;font-size:.875rem}</style>

</head>

<body>

  <h1>scheme on &lt;meta&gt;</h1>

  <p class=warn><strong>Deprecated:</strong> <code>scheme</code> is obsolete in HTML5. Shown for legacy recognition only.</p>

  <p>This head includes:</p>

  <ul>

    <li><code>name="identifier" scheme="ISBN"</code></li>

    <li><code>name="DC.date" scheme="DCTERMS.W3CDTF"</code></li>

  </ul>

  <p>Browsers ignore <code>scheme</code> for metadata processing.</p>

</body>

</html>

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HTML scheme Attribute — Legacy Meta Tag