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Docs: Update .xz file format specification to 1.2.0.
The new RISC-V filter was added to the specification, in addition to updating the specification URL.
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The .xz File Format
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===================
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Version 1.1.0 (2022-12-11)
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Version 1.2.0 (2024-01-19)
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0. Preface
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0.2. Getting the Latest Version
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The latest official version of this document can be downloaded
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from <http://tukaani.org/xz/xz-file-format.txt>.
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from <https://xz.tukaani.org/format/xz-file-format.txt>.
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Specific versions of this document have a filename
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xz-file-format-X.Y.Z.txt where X.Y.Z is the version number.
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For example, the version 1.0.0 of this document is available
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at <http://tukaani.org/xz/xz-file-format-1.0.0.txt>.
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at <https://xz.tukaani.org/format/xz-file-format-1.0.0.txt>.
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0.3. Version History
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Version Date Description
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1.2.0 2024-01-19 Added RISC-V filter and updated URLs in
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Sections 0.2 and 7. The URL of this
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specification was changed.
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1.1.0 2022-12-11 Added ARM64 filter and clarified 32-bit
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ARM endianness in Section 5.3.2,
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language improvements in Section 5.4
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0x08 2 bytes ARM Thumb filter [1]
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0x09 4 bytes SPARC filter
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0x0A 4 bytes ARM64 filter [2]
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0x0B 2 bytes RISC-V filter
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[1] These are for little endian instruction encoding.
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This must not be confused with data endianness.
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7. References
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LZMA SDK - The original LZMA implementation
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http://7-zip.org/sdk.html
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https://7-zip.org/sdk.html
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LZMA Utils - LZMA adapted to POSIX-like systems
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http://tukaani.org/lzma/
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https://tukaani.org/lzma/
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XZ Utils - The next generation of LZMA Utils
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http://tukaani.org/xz/
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https://xz.tukaani.org/xz-utils/
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[RFC-1952]
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GZIP file format specification version 4.3
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http://www.ietf.org/rfc/rfc1952.txt
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https://www.ietf.org/rfc/rfc1952.txt
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- Notation of byte boxes in section "2.1. Overall conventions"
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[RFC-2119]
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Key words for use in RFCs to Indicate Requirement Levels
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http://www.ietf.org/rfc/rfc2119.txt
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https://www.ietf.org/rfc/rfc2119.txt
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[GNU-tar]
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GNU tar 1.21 manual
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http://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
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GNU tar 1.35 manual
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https://www.gnu.org/software/tar/manual/html_node/Blocking-Factor.html
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- Node 9.4.2 "Blocking Factor", paragraph that begins
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"gzip will complain about trailing garbage"
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- Note that this URL points to the latest version of the
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manual, and may some day not contain the note which is in
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1.21. For the exact version of the manual, download GNU
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tar 1.21: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.21.tar.gz
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1.35. For the exact version of the manual, download GNU
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tar 1.35: ftp://ftp.gnu.org/pub/gnu/tar/tar-1.35.tar.gz
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