xar (archiver)

XAR (short for eXtensible ARchive format) is an open source file archiver and the archiver’s file format. It was created within the OpenDarwin project and is used in macOS X 10.5 and up for software installation routines, as well as browser extensions in Safari 5.0 and up. Xar replaced the use of gzipped pax files.

XAR
Filename extensions.xar, .pkg, .xip
Internet media type
application/x-xar
Uniform Type Identifier (UTI)com.apple.xar-archive
Magic numberxar!
Type of formatarchive file format
Extended fromXML, gzip

One development branch of RPM, RPM5, uses xar.

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