1 All "segments" and "directories" in Multics have at least one name.
2 These names are called "entrynames." Entrynames alone, however, are often not
3 sufficient to locate items stored in the system. If the segment or directory
4 you wish to use is catalogued in your "working directory," then the entryname
5 alone will be enough to locate it. For example, if you want to go to a
6 directory immediately below the one you're in, giving the entryname to the
7 change_wdir command will do:
8
9 change_wdir directory_2
10
11 But when you want to use segments and directories that are not in your
12 working directory, you must use either a relative or an absolute pathname. A
13 relative pathname locates a segment or directory relative to the working
14 directory by listing all of the directories between it and the working
15 directory. For example, if you want to print a segment located in a directory
16 one level below your working directory, you could use the relative pathname
17 with the print command:
18
19 print lower_dir>segment
20
21 An absolute pathname, on the other hand, lists all the directories that
22 lead from the "root directory" to the item being identified. For example, the
23 absolute pathname of the segment shown above might look like:
24
25 >udd>Mktg>Jones>lower_dir>segment
26
27 Because absolute pathnames begin at the root, they all begin with the
28 greater-than character >, whereas relative pathnames begin without the
29 greater-than because the first entryname in the path is catalogued in the
30 working directory.