Index: doc/developer/lihata_format/root_board.lht
===================================================================
--- doc/developer/lihata_format/root_board.lht	(revision 17131)
+++ doc/developer/lihata_format/root_board.lht	(revision 17132)
@@ -35,6 +35,7 @@
 					ha:drc {
 						type=ha
 						desc { design rule checker settings for the old DRC }
+						ver {<5}
 						li:children {
 							ha:bloat { valtype=coord; desc={Minimum copper spacing}}
 							ha:shrink { valtype=coord; desc={Minimum overlap between validly touching copper objects}}
Index: doc/developer/lihata_format/tree.html
===================================================================
--- doc/developer/lihata_format/tree.html	(revision 17131)
+++ doc/developer/lihata_format/tree.html	(revision 17132)
@@ -23,7 +23,7 @@
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/size/children/y"><td> &nbsp;&nbsp;&nbsp;y <td> <a href="#valtype:coord">coord</a> <td> &nbsp; <td> drawing area size Y (height)
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/size/children/isle_area_nm2"><td> &nbsp;&nbsp;&nbsp;isle_area_nm2 <td> <a href="#valtype:double">double</a> <td> &nbsp; <td> remove polygon islands smaller than this value, specified in mm<sup>2</sup>
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/size/children/thermal_scale"><td> &nbsp;&nbsp;&nbsp;thermal_scale <td> <a href="#valtype:double">double</a> <td> &nbsp; <td> scale all thermals on the board by this factor
-<tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/drc"><td> &nbsp;&nbsp;ha:drc <td> &nbsp; <td> &nbsp; <td>  design rule checker settings for the old DRC 
+<tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/drc"><td> &nbsp;&nbsp;ha:drc <td> &nbsp; <td> &lt;5 <td>  design rule checker settings for the old DRC 
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/drc/children/bloat"><td> &nbsp;&nbsp;&nbsp;bloat <td> <a href="#valtype:coord">coord</a> <td> &nbsp; <td> Minimum copper spacing
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/drc/children/shrink"><td> &nbsp;&nbsp;&nbsp;shrink <td> <a href="#valtype:coord">coord</a> <td> &nbsp; <td> Minimum overlap between validly touching copper objects
 <tr id="/lht_tree_doc/roots/pcb-rnd-board-v*/children/meta/children/drc/children/min_width"><td> &nbsp;&nbsp;&nbsp;min_width <td> <a href="#valtype:coord">coord</a> <td> &nbsp; <td> Minimum copper width