The following are several examples of regular expression directory name usage:
Windows:
c:\\$\\^client\\collab\D\\ ... |
The expression \D indicates any non-digit character.
d:\\a.b\\c.d\\e.f\\g.h\\[0-9]\\ ... |
The symbol “.” means any character
Windows UNC notation:
\\\\My_Machine\\public\\xyz$\\^abc |
The prefix for Windows UNC notation is \\. After escaping, it becomes \\\\.
UNIX:
/abc\d/def/ghi/ ... |
The expression \d means any digit character.
/^PRE[0-9]{5}\.dat$/ ... |
This expression means to begin with PRE followed by a five-digit number and use a .dat extension. The symbol \. means to interpret the real character (a period) instead of any character. Therefore, PRE12345.dat does match, but PRE123456dat does not.