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

    Stores a library in data-reduced format or expands a library
    previously stored in data-reduced format.

    Format

      /DATA=option

 option

    The option REDUCE, which stores a library in data-reduced format,
    or the option EXPAND, which expands a library previously stored
    in data-reduced format. There is no default; you must specify one
    of the options.

1 - Example

  $ LIBRARY/TEXT/DATA=REDUCE TEXTLIB

      This LIBRARY command stores the data in the text library
      TEXTLIB.TLB in data-reduced format.