Specifies the name of a collating sequence in the default NCS
    library, SYS$LIBRARY:NCS$LIBRARY, or in the NCS library specified
    by the argument library-name. You can view the collating sequence
    names by using the command NCS/LIST at DCL level.

    The collating sequence can be either one of the pre-defined NCS
    collating sequences or one that you have defined yourself using
    NCS.