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  <title>Perennial Data Terms of Use (DToU)</title>
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  <h1>Perennial Data Terms of Use (DToU)</h1>
  <p class="lede">A language for describing the <em>terms of use</em> of data — by providers and consumers alike — designed for the decentralized Web.</p>

  <section>
    <h2>The specification</h2>
    <ul>
      <li><a href="./dtou-spec.html">DToU specification — WWW 2024 camera-ready form</a> <span class="muted">(frozen snapshot for historical reference)</span></li>
      <li><a href="https://github.com/renyuneyun/dtou-lang">DToU language &amp; reasoner</a> <span class="muted">(current, living specification and its version history)</span></li>
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    <h2>The paper (WWW 2024)</h2>
    <p>Rui Zhao and Jun Zhao, &ldquo;Perennial Semantic Data Terms of Use for Decentralized Web&rdquo;, <em>Proceedings of The ACM Web Conference 2024</em>.</p>
    <ul>
      <li><a href="https://doi.org/10.1145/3589334.3645631">doi:10.1145/3589334.3645631</a> &middot; <a href="https://arxiv.org/abs/2403.07587">arXiv:2403.07587</a></li>
      <li><a href="./Poster-WWW2024.pdf">Poster</a> (PDF) &middot; <a href="https://www.youtube.com/watch?v=ERFZdnOq09Y">3-minute video intro</a></li>
    </ul>
  </section>

  <section>
    <h2>In practice</h2>
    <ul>
      <li><a href="https://github.com/renyuneyun/dtou-demo-sosy">Demo apps for DToU + Solid</a> (SoSy 2026)</li>
      <li><a href="https://github.com/renyuneyun/dtou-demo-app">Demo app</a> &middot; <a href="https://github.com/renyuneyun/CommunitySolidServer">Community Solid Server with DToU</a></li>
    </ul>
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  <section>
    <h2>About</h2>
    <p class="muted">Work conducted within the <a href="https://ewada.ox.ac.uk/">EWADA project</a> at the <a href="https://hcc.cs.ox.ac.uk/">Human-Centred Computing group</a>, Department of Computer Science, University of Oxford.</p>
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