The OpenVMS National Character Set (NCS) utility provides a
    set of predefined collating sequences and also lets you define
    collating sequences of your own. In the default NCS library,
    SYS$LIBRARY:NCS$LIBRARY, ncs-name is the name of a collating
    sequence or ncs-name is the name of the collating sequence in
    the NCS library specified by the library-name argument. (In most
    cases, it is simplest to make the collating sequence name the
    same as the ncs-name, for example, CREATE DATABASE . . . COLLATING
    SEQUENCE IS SPANISH SPANISH.) The COLLATING SEQUENCE clause
    accepts both predefined and user-defined NCS collating sequences.

    If you omit the COLLATING SEQUENCE clause in the CREATE DATABASE
    statement at database definition time, the default sequence is
    the DEC Multinational Character Set (MCS).