Index: trunk/doc/user/07_io/export_spice/raw.html
===================================================================
--- trunk/doc/user/07_io/export_spice/raw.html	(revision 7880)
+++ trunk/doc/user/07_io/export_spice/raw.html	(revision 7881)
@@ -27,6 +27,15 @@
 	     schematics with spice/prefix=M will become M_Q41; for the same
 	     symbol if spice/prefix=Q, the component name will be Q41. When present,
 	     it is exported after the value attribute.
+	     <p>
+	     If the model is known and is a subckt, an X prefix is used automatically.
+	     If model is subckt and spice/prefix is also specified, attribute
+	     priorities decide on the final prefix; the subckt X prefix has
+	     the normal plugin priority of target_spice. The user can override
+	     this decision with a spice/prefix of higher priority (e.g. 250). A
+	     symbol would have a spice/prefix attribute at lowest user priority
+	     (31050) so that target_spice can override it with an X if it detects
+	     subckt model.
 
 	<tr>
 	<td> spice/portmap
@@ -40,12 +49,11 @@
 	     the model must have a mod (or prm) file in the spice library. This
 	     mod file must be a stand-alone file with a single .model or .subckt
 	     and will be copied in the output netlist. If the file uses .subckt,
-	     and no spice/prefix is present, the instance name is automatically
-	     prefixed with X. If spice/model_include is specified, the model is
-	     used without any model copied to the output for this component
-	     (and no X prefixing is performed). The model is searched in the lib
-	     with exact file name, with .mod and with .prm appended, all case
-	     sensitive.
+	     a target_spice engine priority spice/prefix=X is added. If
+	     spice/model_include is specified, the model is used without any
+	     model copied to the output for this component (and no spice/prefix=X
+	     set is attempted). The model is searched in the lib first with exact file
+	     name, then with .mod then with .prm appended, all case sensitive.
 	     <p>
 	     See also: <a href="model.html">model options.</a>
 	<tr>