One discovery technique is to list the attributes and capture a selection of their names in the clipboard:
tell application id "com.omnigroup.OmniOutlinerPro3"
set oStyle to style of first selected row of front document
set refAttribs to a reference to attributes of oStyle
set lstNames to name of refAttribs
set varResponse to choose from list lstNames OK button name "Place selections in Clipboard" with multiple selections allowed
if varResponse is not false then
set text item delimiters to return
tell application id "com.apple.finder"
set the clipboard to (varResponse as text)
set text item delimiters to space