A well-known collection of Workflowworkflow Patternspatterns are those proposed by [[Wil van der Aalst]] et al. (2003) in their seminal paper ''Workflow Patterns''.<ref>[[Wil van Der Aalst]], [[Arthur H.M. Hofstede]], Bartek Kiepuszewski, and Alistair P. Barros (2003). [http://www.headlessbrick.org/mediawiki2/images/4/48/WorkflowPatterns-van_der-Aalst-2003.pdf "Workflow Patterns"]. In: ''Distributed and Parallel Databases'' 14 (1): pp. 5--51. {{doi|10.1023/A:1022883727209}}.</ref> with earlier versions published in 2000-02. This collection of patterns focuses on one specific aspect of process-oriented application development, namely the description of [[control flow]] dependencies between activities in a workflow/process. These patterns are divided into the following categories:
