ken types optional or required</span></li><li><a href="#issue-container-number-72">Issue 72</a><span style="text-transform: none">: Group &amp; file level properties</span></li><li><a href="#issue-container-number-53">Issue 53</a><span style="text-transform: none">: Type: font family</span></li><li><a href="#issue-container-number-54">Issue 54</a><span style="text-transform: none">: Should composites be part of the MVP specification?</span></li></ul></section>


  <section id="references" class="appendix"><