Found one file extension association related to XAR and 1 file format developed specifically for use with XAR.
Platform, operating system: Apple macOS / Mac OS X
Go to: XAR description
Developer: Google Inc.
Google software list & details
Developer / company: Google
XAR project aims to provide an easily extensible archive format. Important design decisions include an easily extensible XML table of contents for random access to archived files, storing the toc at the beginning of the archive to allow for efficient handling of streamed archives, the ability to handle files of arbitrarily large sizes, the ability to choose independent encodings for individual files in the archive, the ability to store checksums for individual files in both compressed and uncompressed form, and the ability to query the table of content's rich meta-data.
XAR works with the following file extensions:
Note: You can click on any file extension link from the list below, to view its detailed information. The list of extensions used or otherwise associated with the application may not be complete, because many common file extensions on our website, such as jpg (pictures) or txt (text files), can be opened by a large number of applications, or are too general file format. However most, if not all directly associated file extensions should be listed with its appropriate program. Although its likely, that some file extensions may be missing from the list of associated file extensions with the application, yet they can be opened, be part of, or otherwise be associated with the program.
XAR default file extension associations
Comparison table of actions that XAR can perform with its associated file type beta
This table might not contain all possible associated or supported file types or may contain incorrect data.
If you need more information please contact the developers of XAR (Google Inc.), or check out their product website.
File type \ Action