Adaptive Version Clocks and the OffSync Protocol

The α-OffSync project offers a synchronization concept for α-Flow, an electronic process support in heterogeneous inter-institutional scenarios in healthcare. A distributed case file is provided by α-Flow to represent workflow schemas as documents which are shared coequally to content documents. α-OffSync allows the detection and resolution of global concurrent modification conflicts on process artifacts based on locally available information by using logical timestamps. Further mechanisms are included to ease the management and dynamic extension of the group of participating actors.