Index: 07_io/export_spice/model.html
===================================================================
--- 07_io/export_spice/model.html	(revision 7857)
+++ 07_io/export_spice/model.html	(revision 7858)
@@ -40,6 +40,14 @@
 optionally with symbols), so any spice model used by the sheet is also saved
 in the sheet so the sheet is self-contained (and portable) too.
 <p>
+The following rules apply to the model files in the sch-rnd spice library.
+One model file shall contain only one .model or one .subckt. The file name
+shall match the name of the .model or .subckt in the file. The name
+from spice/model is first searched in all sch-rnd spice libraries in a case
+sensitive manner without suffix; if not found, searched again with .mod
+suffix; if not found searched again with .prm suffix. The convention
+is to name .model files *.prm and .sibckt files *.mod.
+<p>
 Note: the model is copied only once (per unique model name) into the
 sheet-local spice lib and to the spice netlist export.
 <p>
@@ -90,4 +98,4 @@
 <p>
 This is the weakest method, if spice/model or spice/model_card is specified,
 that may modify spice/model_card_uname and will write a model into the
-output file.
\ No newline at end of file
+output file.