data-apis
diff --git a/‎draft/API_specification/generated/array_api.diff.html
Lines changed: 1 addition & 0 deletions b/‎draft/API_specification/generated/array_api.diff.html
Lines changed: 1 addition & 0 deletions
diff --git a/‎draft/searchindex.js
Lines changed: 1 addition & 1 deletion b/‎draft/searchindex.js
Lines changed: 1 addition & 1 deletion
@@ -489,6 +489,7 @@ <h1 id="api-specification-generated-array-api-diff--page-root">diff<a class="hea
 <p class="rubric">Notes</p>
 <ul class="simple">
 <li><p>The first-order differences are given by <code class="docutils literal notranslate"><span class="pre">out[i]</span> <span class="pre">=</span> <span class="pre">x[i+1]</span> <span class="pre">-</span> <span class="pre">x[i]</span></code> along a specified axis. Higher-order differences must be calculated recursively (e.g., by calling <code class="docutils literal notranslate"><span class="pre">diff(out,</span> <span class="pre">axis=axis,</span> <span class="pre">n=n-1)</span></code>).</p></li>
+<li><p>If a conforming implementation chooses to support <code class="docutils literal notranslate"><span class="pre">prepend</span></code> and <code class="docutils literal notranslate"><span class="pre">append</span></code> arrays which have a different data type than <code class="docutils literal notranslate"><span class="pre">x</span></code>, behavior is unspecified and thus implementation-defined. Implementations may choose to type promote (<a class="reference internal" href="../type_promotion.html#type-promotion"><span class="std std-ref">Type Promotion Rules</span></a>), cast <code class="docutils literal notranslate"><span class="pre">prepend</span></code> and/or <code class="docutils literal notranslate"><span class="pre">append</span></code> to the same data type as <code class="docutils literal notranslate"><span class="pre">x</span></code>, or raise an exception.</p></li>
 </ul>
 </dd></dl>
 </section>