Title
Multiparty Symmetric Sum Types
Abstract
This paper introduces a new theory of multiparty session types based on symmetric sum types, by which we can type non-deterministic orchestration choice behaviours. While the original branching type in session types can represent a choice made by a single participant and accepted by others determining how the session proceeds, the symmetric sum type represents a choice made by agreement among all the participants of a session. Such behaviour can be found in many practical sys- tems, including collaborative workflow in healthcare systems for clinical practice guidelines (CPGs). Processes with the symmetric sums can be embedded into the original branching types using conductor processes. We show that this type-driven embedding preserves typability, satisfies semantic soundness and completeness, and meets the encodability criteria (18, 9) adapted to the typed setting. The theory leads to an efficient implementation of a prototypical tool for CPGs which automatically translates the original CPG specifications from a representation called the Process Matrix to symmetric sum types, type checks programs and executes them.
Year
DOI
Venue
2010
10.4204/EPTCS.41.9
EXPRESS
Keywords
DocType
ISSN
cluster computing,satisfiability,programming language
Journal
EPTCS 41, 2010, pp. 121-135
Citations 
PageRank 
References 
6
0.46
13
Authors
3
Name
Order
Citations
PageRank
Lasse Nielsen1211.82
Nobuko Yoshida22607153.29
Kohei Honda369829.60