BPEL Process Instances View shows all the process instances executing in a BPEL
Engine while debugging. Please see the current BPEL Process Instance View
snapshot in attachment. Process Instance can be in one of the following states:
RUNNING, SUSPENDED, COMPLETED, FAULTED, UNKNOWN. Process instances in RUNNING
and SUSPENDED states can be set as Current. Process instance becomes current
when it reaches a breakpoint or user manually sets it as Current. There can be
only one current Process Instance. Current process instance is displayed with
the bold font.
Process instances are being executed by Branches which are similar to Java
Threads. For any RUNNING or SUSPENDED process instance there's at least one
top-level Branch. Branches can spawn child branches. As thus, any RUNNING or
SUSPENDED process instance is a root of a tree of branches.
Current process instance can have one of its branches set as Current. Current
Branch is supposed to be represented in bold.
For now Branches are not visualized in Process Instances View and this is to be
improved.

The icons that are currently used are taken from Java Threads View which is not
appropriate. We need the following icons:
1) Menu icon for BPEL Process Instances View (see "process.gif" for currently
used icon)
2) Node icon for RUNNING Process Instance (see "running.gif" for currently used
icon)
3) Node icon for RUNNING Process Instance which is Current (see "current.gif"
for currently used icon).
4) Node icon for SUSPENDED Process Instance
5) Node icon for SUSPENDED Process Instance which is Current
5) Node icon for FAULTED Process Instance 
6) Node icon for COMPLETED Process Instance
7) Node icon for Process Instance in UNKNOWN state
8) Node icon for Branch
9) Node icon for Branch which is current