Editing Files-11 (section)

== Directory layout ==
[[Image:Files11 directory hierarchy.svg|thumb|right|252px|A typical Files-11 directory hierarchy: all files are rooted in the Master File Directory; File2 is in two directories]]

All files and directories in a Files-11 file system are contained inside one or more ''parent directories'', and eventually under the root directory, the ''master file directory'' (see below). The file system is therefore organised in a directed acyclic graph ([[Directed Acyclic Graph|DAG]]) structure.

In this example (''see right''), <kbd>File 2</kbd> has a directory entry under both <kbd>Dir 2</kbd> and <kbd>Dir 3</kbd>; it is "in" both directories simultaneously. Even if removed from one, it would still exist in the other directory until removed from there also. This is similar to the concept of [[hard links]] in [[UNIX]], although care must be taken that the file is not actually deleted on disks that are not set up for hard links (only available on ODS-5 disks, and then only if the disk has hard links enabled).
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