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-# File System Object
-
-The Nix store uses a simple file system model for the data it holds in [store objects](store.md#store-object).
-
-Every file system object is one of the following:
-
- - File: an executable flag, and arbitrary data for contents
- - Directory: mapping of names to child file system objects
- - [Symbolic link][symlink]: may point anywhere.
-
-We call a store object's outermost file system object the *root*.
-
-    data FileSystemObject
-      = File      { isExecutable :: Bool, contents :: Bytes }
-      | Directory { entries :: Map FileName FileSystemObject }
-      | SymLink   { target :: Path }
-
-Examples:
-
-- a directory with contents
-
-      /nix/store/<hash>-hello-2.10
-      ├── bin
-      │   └── hello
-      └── share
-          ├── info
-          │   └── hello.info
-          └── man
-              └── man1
-                  └── hello.1.gz
-
-- a directory with relative symlink and other contents
-
-      /nix/store/<hash>-go-1.16.9
-      ├── bin -> share/go/bin
-      ├── nix-support/
-      └── share/
-
-- a directory with absolute symlink
-
-      /nix/store/d3k...-nodejs
-      └── nix_node -> /nix/store/f20...-nodejs-10.24.
-
-A bare file or symlink can be a root file system object.
-Examples:
-
-    /nix/store/<hash>-hello-2.10.tar.gz
-
-    /nix/store/4j5...-pkg-config-wrapper-0.29.2-doc -> /nix/store/i99...-pkg-config-0.29.2-doc
-
-Symlinks pointing outside of their own root or to a store object without a matching reference are allowed, but might not function as intended.
-Examples:
-
-- an arbitrarily symlinked file may change or not exist at all
-
-      /nix/store/<hash>-foo
-      └── foo -> /home/foo
-
-- if a symlink to a store path was not automatically created by Nix, it may be invalid or get invalidated when the store object is deleted
-
-      /nix/store/<hash>-bar
-      └── bar -> /nix/store/abc...-foo
-
-Nix file system objects do not support [hard links][hardlink]:
-each file system object which is not the root has exactly one parent and one name.
-However, as store objects are immutable, an underlying file system can use hard links for optimization.
-
-[symlink]: https://en.m.wikipedia.org/wiki/Symbolic_link
-[hardlink]: https://en.m.wikipedia.org/wiki/Hard_link