Relating lanes to participants in BPMN2 DI XML

[Farrukh Najmi]

I am new to BPMN2 and would like to know how to do the following in
BPMN2 DI XML format.

I would like define a set of participants globally and then within
each lane in a BPMN2 process element reference a globally defined
participant.

Here is the structure of the BPMN 2 file I am envisioning.

<definitions>
<!-- Roles that are actors in the process -->
<partnerRole .../>
...
<partnerRole .../>

<!-- The main process -->
<process ...>
<laneSet>
<lane .../>
<lane .../>
</laneSet>

<!--
Various flowElements defined by this process and referenced in
lanes
-->
...
</process>
</definitions>

What I am not sure is:

a) how to define the participant globally (is partnerRole the right
way)
b) how to reference a global participant in a lane

Thanks for any help.

[Farrukh Najmi]

Here is what I think the answer to my question may be. I believe the
solution is to use partitionElementRef attribute of lane and have it
reference the QName used for participantRef element in partnerRole.

Can someone knowledgeable please comment. Thanks.

<?xml version="1.0" encoding="UTF-8"?>
<definitions id="defaultChangeReviewProcess" typeLanguage="http://
www.w3.org/2001/XMLSchema"
expressionLanguage="http://www.w3.org/1999/XPath"
targetNamespace="http://www.omg.org/bpmn20"
xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:roles="urn:acme:roles"
xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL
http://www.omg.org/spec/BPMN/2.0/20100501/BPMN20.xsd">

<!-- TODO: Is this correct way to specify roles -->
<partnerRole name="Submitter" id="submitter">
<participantRef>roles:submitter</participantRef>
</partnerRole>
<partnerRole name="Reviewer" id="reviewer">
<participantRef>roles:reviewer</participantRef>
</partnerRole>

<process>
<laneSet>
<!-- TODO: Is this how to reference participant for each lane --
>
<lane name="Submitter" id="submitterLane"
partitionElementRef="roles:submitter">
</lane>

<lane name="Reviewer" id="reviewerLane"
partitionElementRef="roles:reviewer">
</lane>
</laneSet>

</process>

</definitions>

[Bruce Silver]

Lanes would not reference partnerRole. partnerRole has to do with role in a
'collaboration' - interaction between processes - not role within a process.
This is common confusion over the BPMN term 'participant', i.e. party
involved in a collaboration, such as buyer vs seller, which is NOT the same
as 'performer'. A lane would typically reference the performer (or subclass
of it, such as potentialOwner). See section 10.2.4 of the spec for
examples.

Bruce Silver
Principal, Bruce Silver Associates/BPMessentials
(831) 685-8803

</process>

</definitions>

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[Farrukh Najmi]

Thanks for the clarification.

So a laneSet corresponds to a role in a collaboration while a lane in
a laneSet corresponds to a performer within a specific process (please
correct if I am still off base).
If I am correct then how does a laneSet reference a partnerRole?

Thanks for your help.

>   xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODELhttp://www.omg.org/spec/BPMN/2.0/20100501/BPMN20.xsd">

[Bruce Silver]

No. Laneset just identifies (optionally) the type of information used to
classify process nodes into lanes, in your case performer or potentialOwner.
It is internal to the process. 'Participant' in a collaboration identifies
the role of the process as a whole (or external entity interacting with the
process via messages).