a class="reference external" href="https://spdx.org/licenses/">(SPDX) license identifier</a> such as
<code class="docutils literal notranslate"><span class="pre">MIT</span></code>, <code class="docutils literal notranslate"><span class="pre">BSD-3-Clause</span></code>, or <code class="docutils literal notranslate"><span class="pre">LGPL-3.0-or-later</span></code>. In the case of a
choice of licenses or more complex restrictions, compound license
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