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 (XAR files). For example, Assay Designs
can be saved in a XAR file format.
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.