Semantic difference in the first <receive>

[Ricky Ho <riho@cisco.com>]

There is no way to pass data to "initialize the variables" of a newly 
creating process instance.  The only thing that you can do is to put a 
<receive ... createInstance="yes"/> as the first activity so that the 
process instance can receive external data for variable initialization.  In 
this case, the first <receive> has very different semantics from subsequent 
<receive> and I argue that this should be model explicitly.  Therefore, 
rather than using the following ....

<process>
	....
	<sequence>
		....
		<receive partner="buyer" portType="p1" operation="submitOrder" 
variable="var1" createInstance="yes"/>
		....
		<receive ..../>
	<sequence>
</process>

We should use this ...

<process>
	...
	<triggeredBy>
		<receive partner="buyer" portType="p1" variable="var1" 
operation="submitOrder"/>
	</triggeredBy>
	...
	<sequence>
		....
		<receive ..../>
	<sequence>
</process>

Best regards,
Ricky