Index: 02_data.html
===================================================================
--- 02_data.html	(revision 4721)
+++ 02_data.html	(revision 4722)
@@ -211,12 +211,13 @@
 A newly created group has NIL (empty) src_uuid. Any copy of the group
 (e.g. an instance of the a library symbol on a sheet) will have src_uuid
 filled in with the src_uuid value of the source group, or if that was NIL,
-with the instance uuid of the source group.
+with the "instance uuid" (the group's <i>uuid</i> field) of the source group.
 
 <p>{des2:53}
 When an existing instance is moved within the sheet, renamed, its
-attributes changed, it retrains instance UID. When the instance is
-copied, the new copy is a new instantiaton and gets a new instance UID.
+attributes changed, it retrains instance UID (<i>uuid</i> field). When the instance is
+copied, the new copy is a new instantiaton and gets a new instance UID. In
+both cases it retains its <i>src_uuid</i> field.
 
 <p>{des2:20}
 A symbol is usually part of a component, donating ports and attributes to