LabKey Server's Experiment module provides a framework for describing experimental procedures and for transferring experiment data into and out of a LabKey Server system. An experiment is a series of steps that are performed on specific inputs and produce specific outputs. Experiments can be described, archived and transferred in experiment descriptor files.
A LabKey XAR file, short for "eXperiment ARchives", is a ZIP archive with a renamed file extension. It is not to be confused with a different file type, an "eXtensible ARchiver" which shares the same XAR extension.
At the root of a LabKey XAR file is a xar.xml file that serves as a manifest for the contents of the XAR.