Each directory or filename:
- Is preceded by a slash (/). The system treats any consecutive
slashes as a single slash.
- Can contain symbolic parameters.
- Has a length of 1 through 254 characters, not including the slash.
- Consists of printable characters from X'40' through X'FE'. These
printable characters include all the characters that can be used in
a portable filename, plus additional characters. For a portable filename,
use only the portable filename character set, which is listed in z/OS V2R2.0 UNIX System Services User's Guide. A filename can contain characters
outside this range, but it cannot be specified in JCL.
- Is subject to symbolic substitution. An ampersand (&) (X'50'),
followed by a character string that matches a valid symbolic parameter
in the JCL, causes a substitution to occur, based on the syntax rules
for symbolic parameters.
- Is case-sensitive. Thus, /u/joe and /u/JOE and /u/Joe define three
different files.