VMS Help ASSIGN, Qualifiers, /TRANSLATION_ATTRIBUTES  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /TRANSLATION_ATTRIBUTES[=(keyword[,...])]

    Equivalence-name qualifier.

    Specifies attributes of the equivalence-name parameter. Possible
    keywords are as follows:

    CONCEALED  Indicates that the equivalence string is the name of a
               concealed device.

               When a concealed device name is defined, the system
               displays the logical name, rather than the equivalence
               string, in messages that refer to the device. If you
               specified the CONCEALED attribute, then the equivalence
               string must be a physical device name.

    TERMINAL   Indicates that the equivalence string should not be
               translated iteratively; logical name translation should
               terminate with the current equivalence string.

    If you specify only one keyword, you can omit the parentheses.
    Only the attributes you specify are set.

    Note that different equivalence strings of the same logical name
    can have different translation attributes specified.