Index: 03_drawing.html
===================================================================
--- 03_drawing.html	(revision 3636)
+++ 03_drawing.html	(revision 3637)
@@ -423,7 +423,7 @@
 <tr><td> <i>role</i> <th> one of 3.3.3. <th> specify what concrete object the group represents
 </table>
 
-<p>{des3:56} The list of members consist of 1 or more atoms or composites. If
+<p id="des3:56">{des3:56} The list of members consist of 1 or more atoms or composites. If
 the rotation angle is specified, first the coordinates of members are
 rotated around the rotation center. If any of the mir* fields are true,
 mirroring is performed then.  If the offset is specified, the
@@ -445,6 +445,7 @@
 <tr><td> x, y       <td> yes       <td> x;y offset; can be 0;0 for no action
 <tr><td> mirx       <td> no        <td> boolean; mirror X coords (mirror over y axis); default is false if not specified
 <tr><td> miry       <td> no        <td> boolean; mirror Y coords (mirror over x axis); default is false if not specified
+<tr><td> child_xform<td> no        <td> see <a href="#des3:83">below</a>
 </table>
 
 <p>{des3:59} The same attributes are available as for the group object.
@@ -453,6 +454,34 @@
 
 <p>{des3:60} The ref field contains a reference oid-path.
 
+<p id="des3:83">{des3:83} The child_xform field is an unordered list of child
+transformations. Each element of the list contains a oid-path of a child
+object (relative to the referenced group) and one or more transformation
+command.
+
+<p>{des3:84}
+Each oid-path can be present only once on the list and each transformation
+can be present only once in a given entry.
+
+<p><table border=1 cellspacing=0>
+<tr><th colspan=3 bgcolor="#aaaaaa"> {des3:85} child_xform transformation commands
+<tr><th> name   <th> value type <th> description
+<tr><td> movex  <td> coord      <td> child is moved (translated) in the X direction
+<tr><td> movey  <td> coord      <td> child is moved (translated) in the Y direction
+<tr><td> rot    <td> angle (deg)<td> child is rotated
+<tr><td> mirx   <td> boolean    <td> if true, child is mirrored left/right
+<tr><td> miry   <td> boolean    <td> if true, child is mirrored up/down
+<!--<tr><td> remove <td> boolean    <td> if true, child is removed -->
+</table>
+
+<p>{des3:86}
+Order of transformations on ech child object:
+<ul>
+	<li> first the group reference's child object is instantiated (copied from the referee)
+	<li> then parent group transformations are applied (including the transformations of the group_ref)
+	<li> then the child_xform commands are executed (in the same order as <a href="#des3:56">group transformations are applied</a>)
+</ul>
+
 <h3> 3.3.3. The role attribute </h3>
 
 <p>{des3:61} A group or group_ref is a drawing object, that can be the