Xar (Extensible Archive)

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File Format
Name Xar (Extensible Archive)
Extension(s) .xar
PRONOM fmt/600
For other "Xar" formats, see the Xar disambiguation page.

xar (eXtensible ARchive) is an open-source archive format which stores its directory information and other metadata in the form of XML.

The file format starts with a short binary header (which begins with the "magic" sequence consisting of "xar!" expressed as a 32-bit integer made from the ASCII character representations (0x78617221) in network byte order (big-endian). This byte order is used for all multi-byte numbers in the binary portions of the file format.

After the header is the directory information and metadata in XML, using the UTF-8 character encoding.

The remainder of the file consists of the binary data of the archive contents, known as "The Heap".

Format info


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