Besides, the standard does not provide guidance on how the modeling notation should be used to attain a comprehensible and expressive BPMN model. However, it is a complex technical document not intended to common business modelers. The BPMN standard specification can be referred, for the definition and meaning of each element, as well as regarding how they can be connected. The specification defines different types of conformance that tools’ implementers can adhere for: (i) process modeling (elements that are part of the orchestration in a single process, as well as elements that participate in the collaboration among processes) (ii) BPMN process execution (the operational semantics support and interpretation of activity life-cycle) (iii) BPEL process execution (mapping of a BPMN model to WS-BPEL) and (iv) choreography modeling (emphasizing modeling of the interaction among participants). Therefore, the BPMN standard formalization of the process modeling concepts and their relationships is accomplished by means of a metamodel. The BPMN language definition is based upon a metamodel built with the UML, the standard de facto for software engineering modeling (UML, 2007a, 2007b). Version 2 of the BPMN standard, is a step forward in the alignment of process modeling with the OMG's initiative of Model Driven Architecture (MDA) (OMG, 2001).
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BPMN has also transformations to other notations available, such as Petri-Nets and CSP, which allow the use of accessible tools for formal verification (Dijkman, Dumas, & Ouyang, 2007 Wong & Gibbons, 2008). BPMN is also nowadays the business process notation most used among BPM practitioners, and the process modeling language with more modeling tools available 1 (Harmon & Wolf, 2011).
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Recker, Rosemann, Indulska, & Green, 2009). Recker, Indulska, Rosemann, & Green, 2005 J.C. So, it is grounded on the experience of earlier ones, which ontologically makes it one of the most complete process modeling languages available (J.C. BPMN (Business Process Modeling and Notation) is one of the most recent process modeling languages (OMG, 2011).