XArch is an archive management system that allows one to create, populate, and query archives of multiple database versions. It is based on a nested merge approach that efficiently stores multiple database versions in a compact archive. The system allows one to create new archives, to merge new versions of data into existing archives, and execute both snapshot and temporal queries using a declarative query language. XArch is an output from DCC-funded research at Informatics at the University of Edinburgh. Any questions or comments regarding XArch, please contact Heiko Müller.