OpenVMS utilities and commands with default support have had
    little or no modification to take advantage of Extended File
    Specifications features. These utilities and commands are
    expected to handle most of the attributes of extended file
    specifications (such as new characters and deep directory
    structures) correctly. However, issues with case sensitivity
    and case blindness (such as converting lowercase characters to
    uppercase) may occur.

    In contrast with utilities that have full support, utilities with
    default support rely on DID and FID abbreviation offered by RMS
    to handle long file specifications. As a result, these utilities
    are subject to the following restrictions related to DID and FID
    abbreviation:

    o  Matching operations in an environment where FID abbreviation
       is used may not always work as expected. For example, wildcard
       matching operations may not capture all target file names
       because the long file names may be represented in their
       numeric FID abbreviation form. This restriction specifically
       applies to matching operations that are performed outside of
       RMS.

    o  Wildcards and sticky defaults cannot be used with a FID
       abbreviation. For example, the following commands are illegal:

       $ DIRECTORY a[1,2,3]*.txt
       $ COPY a[1,2,3].txt *.txt2

       Because FID abbreviations are a unique numeric representation
       of one file, they cannot be used to represent or match any
       other file.

    o  Creating a file using a FID abbreviation is illegal.