custom-type-definitions"><div class="header-wrapper"><h4 id="x9-3-2-appending-custom-type-definitions"><bdi class="secno">9.3.2 </bdi>Appending custom type definitions</h4><a class="self-link" href="#appending-custom-type-definitions" aria-label="Permalink for Section 9.3.2"></a></div>
  <p>A tool might not understand certain user-defined type definitions in a token file and therefore can't do anything special with them. However, that tool could export or modify token files by adding their own type definiti