Extended file attributes are file system features that enable users to associate computer files with metadata not interpreted by the filesystem, whereas regular attributes have a purpose strictly defined by the filesystem (such as permissions or records of creation and modification times). Unlike forks, which can usually be as large as the maximum file size, extended attributes are usually limited in size to a value significantly smaller than the maximum file size. Typical uses include storing the author of a document, the character encoding of a plain-text document, or a checksum, cryptographic hash or digital certificate, and discretionary access control information.
In Unix-like systems, extended attributes are usually abbreviated as xattr.[1]
^xattr(7) – Linux Programmer's Manual – Overview, Conventions and Miscellanea
and 23 Related for: Extended file attributes information
support extendedattributes, using the extattr_ family of system calls. Any regular file may have a list of extendedattributes. Each attribute consists...
on extendedattributes (EAs) and stores them in a hidden file called "EA␠DATA.␠SF" in the root directory of the FAT12 or FAT16 volume. This file is indexed...
by Benoit Schillings - formerly BFS), it includes support for extendedfileattributes (metadata), with indexing and querying characteristics to provide...
tail-packing inline data technology Support POSIX attributes and permissions, extendedfileattributes and ACL Fixed-size output transparent compression...
Additional attributes can be associated on file systems, such as NTFS, XFS, ext2, ext3, some versions of UFS, and HFS+, using extendedfileattributes. Some...
other filesystems or nodes. It lacks support for extendedfileattributes (xattr). The HAMMER2 file system was conceived by Matthew Dillon, who initially...
document". Thus a file may have several types. The NTFS filesystem also allows storage of OS/2 extendedattributes, as one of the file forks, but this feature...
The attributes of a file are stored in the directory entry that describes the file, and optionally in the extendedattribute record. To locate a file, the...
6.35 added support for extendedfileattributes. Free and open-source software portal AppImage Btrfs Cloop Comparison of file systems Cramfs e2compr EROFS...
access-control list permissions, resource forks, named extendedattributes, and advanced file locking. AFP versions 3.0 and greater rely exclusively on...
meta-information to the graphics objects. Files with attributes are called X2 files; those without attributes are X1 files. Standard Gerber, or RS-274-D. This...
only root and the file owner). They are also designed to support Windows interoperability. Richacls use ext4 extendedfileattributes (xattrs) to store...
deleting and searching for files, as well as modifying fileattributes, properties and file permissions. Folders and files may be displayed in a hierarchical...
OS Extended or HFS Extended) is a journaling file system developed by Apple Inc. It replaced the Hierarchical File System (HFS) as the primary file system...
ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3. ext4 was initially a series of backward-compatible...
data of files, the alternate data streams, or the index data for directories are stored as attributes. According to $AttrDef, some attributes can be either...
a device file, device node, or special file is an interface to a device driver that appears in a file system as if it were an ordinary file. There are...
layered on top of extendedattributes. Some operating systems implemented extendedattributes as a layer over UFS1 with a parallel backing file (e.g., FreeBSD...
distributed file system protocols. For instance, Gifford et al.’s 1991 implementation was fully compatible with NFS. Extendedfileattributes provided by...
A clustered file system (CFS) is a file system which is shared by being simultaneously mounted on multiple servers. There are several approaches to clustering...
InterPlanetary File System (IPFS) is a protocol, hypermedia and file sharing peer-to-peer network for storing and sharing data in a distributed file system....
ext3, or third extended filesystem, is a journaled file system that is commonly used by the Linux kernel. It used to be the default file system for many...
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