
      consist of the following parts, in exactly the following
      order:
      <ol>
<li>A
        "<code title="U+003C LESS-THAN SIGN">&lt;</code>"
        character.</li>
        <li>A
        "<code title="U+002F SOLIDUS">/</code>"
        character</li>
        <li>The element&#8217;s
        <a href="syntax.html#tag-name" title="syntax-tag-name" id="tag-name_xref4">tag name</a>.</li>
        <li>Optionally, one or more
        <a href="terminology.html#space" title="space character" id="space_xref17