A record calculus based on symmetric concatenation

Robert Harper, Benjamin Pierce
1991 Proceedings of the 18th ACM SIGPLAN-SIGACT symposium on Principles of programming languages - POPL '91  
Type systems for operations on extensible records form sumpt ion; we argue that the resulting system is more straightforward than subsumption-based alternatives.
doi:10.1145/99583.99603 dblp:conf/popl/HarperP91 fatcat:osrh6p3zsjg5fmbpalxo4markq