ect>
         <text class="terminal" x="141" y="53">SESSION</text>
         <a xlink:href="sql-grammar.html#session_var" xlink:title="session_var">
            <rect x="255" y="3" width="96" height="32"></rect>
            <rect x="253" y="1" width="96" height="32" class="nonterminal"></rect>
            <text class="nonterminal" x="263" y="21">session_var</text>
         </a>
         <path class="line" d="m17 17 h2 m0 0 h10 m62 0 h10 m20 0 h10 m0 0 h92 m-122 0 h20 m102 0 h20 m-142 0 q10 0 10 10 m122 0 q0 