"A way of aggregating services to business processes. In contrast to orchestration, choreography does not compose services to a new service that has central control over the whole process. Instead, it defines rules and policies that enable different services to collaborate to form a business process. Each service involved in the process sees and contributes only a part of it." (Nicolai M Josuttis, "SOA in Practice", 2007)
"An a priori global and public model meant to capture all the interactions taking place for a given purpose among a number of participants." (Giorgio Bruno & Marcello La Rosa, "Collaboration Based on Web Services", 2008)
"Choreography is the message exchange behavior that a business exposes in order to participate in a business relationship based on electronic message exchanges." (Christoph Bussler, "Business-to-Business (B2B) Integration", 2009)
"It is a service composition paradigm where no centralized entity is responsible for coordinating the execution of the subordinate services. It is often seen as an abstract service composition since it defines cooperation (e.g., message exchanging) rules but no actual execution flow." (Carlos Kamienski et al, "Managing the Future Internet: Services, Policies and Peers", 2010)
[Web Service Choreography:] "A particular web service composition where several peer web services collaborate in a distributed environment. In a choreography there is not a services acting as a leader and synchronizing the work of the other services, as happen in case of orchestration. This makes choreography more difficult to realize in real settings." (Liliana Ardissono et al, "An Event-Based Middleware for the Management of Choreographed Services", 2012)
"Contract between two or more systems, which establishes how they cooperate to achieve some common goal." (José C Delgado, "Frameworks for Distributed Interoperability", Encyclopedia of Information Science and Technology, 2015)
"Global behavior is called choreography. Choreography is specified using UML activity diagrams. We have used two levels of choreography models: flow-global and flow-localized." (Surya B Kathayat, "Collaboration-Based Model-Driven Approach for Business Service Composition", 2012)
"Define the service collaboration at service-computing level." (Laura C Rodriguez-Martinez et al, "Service-Oriented Computing Applications (SOCA) Development Methodologies: A Review of Agility-Rigor Balance", 2021)
"Defines the requirements and sequences through which multiple Web services interact." (NIST SP 800-95)
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