Correct
" J O B . 1 A " Filename including an extension on the default drive.
" 2 - P R O G 2 5 " Filename with no extension on disc drive 2.
" 2 - 5 J O B . M Y " Filename with extension on drive 2.
Incorrect
" l - P R O G R A M . 2 5 " Name part is too long (7 characters).
" F R E D + 3 " + is not alphanumeric and is therefore not allowed.
6. Ambiguous filenames.
You will see that some instructions include (ambiguous filename). This
means that as well as specifying one filename, you can specify a number
of filenames. The way in which you specify an ambiguous filename is by
using
wildcard
characters, of which there are two (* and ?) * specifies
any number of letters and/or digits in any combination and ? specifies
any number or letter. The only requirement is that you must specify no
characters after the * in the name part or the extension. Below are some
correct and incorrect examples of the use of
wildcard
characters:
Correct
P*.JO? This looks at all files and any with P at the beginning of the
name and JO at the beginning of the extension will be selected.
J ? B ? . B ? Only filenames with four name characters and two extension
characters will be looked at (? specifies only one character). A n y
filenames with J and B as the first and third name characters and B as
the first extension character will be selected.
Incorrect
"P*J2.NO?" There are characters after the * in the name part.
" P R O G 1 ? . * B There is a character after * in the extension part.
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