<svg width="10cm" height="3cm" viewBox="0 0 100 30">
     <desc>Example Use02 - 'use' on a 'symbol'</desc>
     <defs>
          <symbol id="MySymbol" viewBox="0 0 20 20">
               <desc>MySymbol - four rectangles in a grid</desc>
               <rect x="1" y="1" width="8" height="8"/>
               <rect x="11" y="1" width="8" height="8"/>
               <rect x="1" y="11" width="8" height="8"/>
               <rect x="11" y="11" width="8" height="8"/>
          </symbol>
     </defs>
     <use x="45" y="10" width="10" height="10" xlink:href="#MySymbol"/>
</svg>