Use case:
BPEL activities contain references to other BPEL objects. 
For example BPEL Invoke source looks like this

         <invoke name="ReserveAirline" partnerLink="Airline"
portType="ares:AirlineReservationPortType" operation="reserveAirline"
inputVariable="ReserveAirlineIn">


User wants to be able to quickly navigate in the Diagram from the Invoke to the
PartnerLink.

Scenario:
User is looking at Invoke
User want to navigate to ParnterLink that is connect to this Invoke by a message
flow.
User selects context menu on the Invoke activity.
 Go To Definitions > Partner Link
Diagram re-orients to show and select the Partner Link.


Recommendation:
Add context menu to all BPEL activities for such reference navigation.
In the BPEL object model, the references are formalized. 
So it should be fairly easy to build list of menus dynamically from the
avialable references.

Issues:
What should the name of this action be - Go to Definition / Go to Reference .
Cant the menus be built dynamically from established refrence relationships 
e.g. Go To Definition : Airline [Parnter Link]
or should such menus be hard coded for structural relationship
e.g. Go To Definiton > Parnter Link

The other big issue is that many cases of reference usage is not really
visualized in the diagram. Most reference usage is of Variables and Correlation
Sets. You cannot "go to" a variable definition in the diagram.
One option here is that we go to the Variable declaration in the Navigator tree.
However, this creates a possible confusiion for user, in some cases the Go To
would change diagram selection and position, and in other cases it would only
change selelection in Navigator and give navigator focus. This may be a big
problem. We need to identify the full list of reference usages in order to
determine if there is really a common use case with a common solution or wethher
there are completely different use cases. If in fact there are only a few cases
where diagram repositioning is involved, maybe we should consider them as
distinct and provide a different  action.

Need to open a wiki issue on this.