reference of result of duplicate command in applescript?
 

Consider this code to duplicate a selected graphic

[CODE]tell application "OmniGraffle Professional 5"
set theSelection to the selection of front window
set theObject to item 1 of theSelection
duplicate theObject
end tell[/CODE]

How do I get a reference to the new graphic?

You can duplicate it to a particular position in the graphics collection, and then reference the graphic at that position:

[CODE]tell application id "OGfl"
tell front window
set theObject to item 1 of (selection as list)
tell its canvas
duplicate theObject to end of graphics
set oDuplicate to item -1 of graphics
end tell
end tell
end tell[/CODE]