ty is an object where tools <em class="rfc2119">MAY</em> add proprietary, user-, team- or vendor-specific data to a design token. When doing so, each tool <em class="rfc2119">MUST</em> use a vendor-specific key whose value may be any valid JSON data.</p>
  <ul>
  <li>The keys <em class="rfc2119">SHOULD</em> be chosen such that they avoid the likelihood of a naming clash with another vendor’s data. The <a href="https://en.wikipedia.org/wiki/Reverse_domain_name_notation">reverse domain name notation</a> is 