/a></div>
  <p>At first glance, groups and composite types might look very similar. However, they are intended to solve different problems and therefore have some important differences:</p>
  <ul>
  <li>Groups are for arbitrarily grouping tokens for the purposes of naming and/or organization.<ul>
  <li>They impose no rules or restrictions on how many tokens or nested groups you put within them, what they are called, or what the types of the tokens within should be. As such, tools <em class="rfc2119">MUST NO