_subtype.h6"></a>
      <span class="phrase"><a name="variadic_macro_data.vmd_identifier_subtype.uniqueness_of_identifier_subtype"></a></span><a class="link" href="vmd_identifier_subtype.html#variadic_macro_data.vmd_identifier_subtype.uniqueness_of_identifier_subtype">Uniqueness
      of identifier subtype values and v-type</a>
    </h4>
<p>
      When we define a new identifier subtype we need to be careful that the values
      of that subtype and its actual v-type are unique identifiers within any transl