e are many 
   wire segments but only 3 electrical nodes. XSCHEM recognizes connection of wires and uses this 
   information to build up the circuit connectivity. All wires are drawn on the 'wire' layer. One 
   electrical node in the picture below has been highlighted in red (this is a XSCHEM function we 
   will cover later on).
  </p>
  <img src="xschem_wires.png">

  <h3> LINES </h3>
  <p>
   Lines are just segments that are used for drawing. Lines do not have any electrical meaning, in fact
   when bu