Description Hassan BAZOUN 2012-12-26 11:36:46 EST

BPMN2.0 models are considered as target models in many model to model transformations. At the end of every transformation there is a need to open and visualize the new created models. The problem with the BPMN2.0 modeler is the following: in order to open a BPMN2.0 model it must be composed of basic BPMNDI and DC elements and from these elements is the <dc:Bounds> element with the attributes x and y to position the element in the diagram. As no auto layout function is availabale within the modeler, it is obligatory to assign these values either manually or create a certain algorithim to position graphical elements which sounds a heavy task.

a scenario to the above problem is the following:

-User X wants to transform an 'A' model to a BPMN2.0 model
-X applies the ATL transformation rules to the 'A' model
-The result of the transformation is a BPMN2.0 model with only BPMN elements
-X needs to open his model in the BPMN2.0 modeler
-X develops an XSLT sheet to create the BPMNDI elements
-X finds himself obliged to create an algorithim to position the graphical objects (assign x and y attributes)
-As X is not familiar with such rules and algorithims, X is blocked

How auto layout of graphical objects is helpful in such scenarios?
x and y attributes are not mandatory, and if thier value is null the modeler will assign proper values depending on relations and connections between objects