# Data Replication * :scroll: [A comprehensive study of Convergent and Commutative Replicated Data Types](a-comprehensive-study-of-convergent-and-communative-replicated-data-types.pdf) > Eventual consistency aims to ensure that replicas of some mutable shared object converge without foreground synchronisation. We study a principled approach: to base the design of shared data types on some simple formal conditions that are sufficient to guarantee even- tual consistency. We call these types Convergent or Commutative Replicated Data Types (CRDTs).