Wil M. P. van der Aalst 
Transactions on Petri Nets and Other Models of Concurrency II 
Special Issue on Concurrency in Process-Aware Information Systems

Transactions on Petri Nets and Other Models of Concurrency (To PNo C) IIThese Transactions publish archival papers in the broad area of Petri nets and other models of concurrency, ranging from theoretical work to tool support and industrial applications. To PNo C issues are published as LNCS volumes, and hence are widely distributed and indexed. This Journal has its own Editorial Board which selects papers based on a rigorous two-stage refereeing process. To PNo C contains:- Revised versions of a selection of the best papers from workshops and tutorials at the annual Petri net conferences- Special sections/issues within particular subareas (similar to those published in the Advances in Petri Nets series)- Other papers invited for publication in To PNo C- Papers submitted directly to To PNo C by their authors The second volume of To PNo C focuses on Concurrency in Process-Aware Information Systems. Although the topic of business process management using information technology has been addressed by consultants and software developers in depth, more fundamental approaches towards such Process-Aware Information Systems (PAISs) have been rather uncommon. It wasn’t until the 1990s that researchers started to work on the foundations of PAISs. Clearly, concurrency theory is an essential ingredient in these foundations as business processes are highly concurrent involving all types of routing logic and resource allocation mechanisms. The 16 papers in this special issue of To PNo C cover topics ranging from the formal (mostly Petri-net based) foundations of PAISs to more applied topics such as flexibility and process mining. Thus, this volume gives a good overview of the state of the art in PAIS research.