/EXTENDED_SYNTAX
    /NOEXTENDED_SYNTAX (D)

    The /EXTENDED_SYNTAX qualifier instructs MMS to enable the
    extension of MMS syntax, providing for the following:

    o  Use of predefined MMS functions.

    o  Macro redefinition.

    o  Nested macro expansion.

    To enable the /EXTENDED_SYNTAX qualifier in DECwindows MMS, check
    the Extended Syntax check box in the Build Definitions/Directives
    Options dialog box.

    The /EXTENDED_SYNTAX qualifier will be used to include all future
    extensions to the MMS syntax. The inverse qualifier, the default
    /NOEXTENDED_SYNTAX, will continue to support the syntax of MMS
    Version 3.2.