1.Read reference [2]. Using the process description language of your choice, describe how to implement sagas and other advanced transaction models using that particular format. Is there any construct...

1.Read reference [2]. Using the process description language of your choice, describe how to implement sagas and other advanced transaction models using that particular format. Is there any construct missing? Are there any programming primitives that would make the whole design easier? 2. Read reference [6]. Extend the ideas in that paper to sagas to allow (a) arbitrary partial orders between the activities and (b) nesting of activities. Can you represent the resulting mechanisms using a process modeling language?