Summary:

Question: Regarding jPDL: Can it be converted to another language? For example 
XPDL? Is there any correlation btw. both of them (XPDL and jPDL)?
Answer: Each activity has an implementation, which can be a task (task in a 
task-node) or a sub-flow (proceess-state), among others. Transitions can be 
attached conditions (transitions conditions in a decision node). Nodes can 
impose restrictions on incoming and outgoing transitions to model choice, 
concurrency and partial or total synchronization (fork, join and decision 
nodes). 

Given this shallow comparison, I'm convinced there is a mechanical procedure to 
convert XPDL documents to jPDL documents. The inverse is not possible if the 
jPDL document contains delegations. In a nutshell, jPDL can be converted to 
XPDL. It's just that we feel, with the feedback from the community in mind, 
that the considerable effort needed to provide an XPDL converter does not add 
enough value to justify it.

Question: Regarding the BPEL Extension: Which BPEL Standard is supported? I 
found standard 1.1 and 2.0 mentioned. Are both of them fully supported?
Answer: Regarding BPEL, we aim to support versions 1.1 and 2.0. The latter is a 
moving target, tough, because the OASIS technical committee is still working on 
it. Right now we are working in the draft dated Sep 1, 2005.

Question: What does the role concept of jBPM look like? With role concept i 
mean that processes can be attached to different roles.
Answer: jBPM makes a separation between process roles, termed swimlanes after 
the equivalent concept in UML activity diagrams, and organization roles. This 
allows you to group responsibilities irrespective of the actual shape of the 
organization. 
See the jBPM user guide, section 9.4 for details about swimlanes.

Question: BPEL doesnt support any kind of roles, as far as i know. Is this 
right?
Answer: BPEL, as an orchestration language, defines service roles. There is a 
construct in BPEL called partner link, which models the conversational 
relationship between two (web) services. Further, it defines the role of each 
service in the conversation. A partner link type defines the connection between 
these two services. Note the two roles in the relationship and how a port type 
specifies the interface each service presents to the other.

Question: Is some kind of admin tool available for jBPM? (for monitoring 
running processes and so on)?
Answer: The jBPM web application supports the creation of new process 
instances, task lists, and several monitoring capabilities. Try the starters 
kit. You can have it running in 5 minutes and it will give you a better idea of 
what we offer.

Question: Is there the possibility of administrating work- / todo lists?
Answer: With "todo lists" you mean a list of tasks to be performed by a given 
person? If so, jBPM and the web app do it.

Question: What communication possibilities does jBPM provide? SOAP? RMI? etc.
Answer: jBPM itself does not provide specific actionhandlers or components to 
achieve this (yet). Since actionhandlers are written in Java, you can do 
anything you like. 
e.g. Get a WSDL, generate javacode and make an actionhandler out of it. There 
has been some thinking of providing some soap wrapper, but it is not high on 
the list, since it is very to have any kind of communication. 
If you think esb (Enterprise Service Bus) (e.g. the upcomming jboss 
implementation or others, mule, servicemix) they provide you with service 
bindings (jbi communication service) for e.g. mq, jms, soap, ftp etc.... now 
that would be great....

Question: Does jBPM support process simulation?
Answer: No.

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