Index: 07_io/export_spice/raw.html
===================================================================
--- 07_io/export_spice/raw.html	(revision 7745)
+++ 07_io/export_spice/raw.html	(revision 7746)
@@ -102,10 +102,28 @@
 	     with the same spice/pinnum in any slot is copied to all other slots for
 	     the same terminal. A typical example is the positive and negative supply
 	     of a dual or quad opamp: spice will get 2 or 4 discrete opamps, but
-	     the power supply will be specified only on one slot.
+	     the power supply will be specified only on one slot. The value of
+	     this attribute does not matter.
 </table>
 
+
+<H3 autotoc="yes"> net attributes </H3>
 <p>
+<table border=1 cellspacing=0>
+	<tr>
+	<th>attribute
+	<th>descriptioon
+
+	<tr>
+	<td> spice/gnd
+	<td> if set, the given network would be the true ground, "node 0" in the spice
+	     netlist. Must not be set on multiple nets. If not set, target_spice
+	     elects a "node 0" looking at net names. (The spice netlist format
+	     requires one of the nets dedicated as "node 0" for gnd.) The value of
+	     this attribute does not matter.
+</table>
+
+<p>
 The final spice <i>instance line</i>is built by appending the following sections
 in order, in a single line:
 <ul>