VMS Help SORT, Specification File Qualifiers, /OMIT, Full Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You can specify that records are to be omitted from the output
    file by using the /OMIT qualifier. First, you must define a
    condition with the /CONDITION qualifier. Specify your record
    selection with an /OMIT qualifier requesting the records
    satisfying that condition be selected for omission from your
    sort. By default, Sort/Merge includes all the other input records
    in the output file.

    You can specify multiple /OMIT and /INCLUDE qualifiers in your
    specification file. The order you specify them determines the
    order the input records are tested for omission. All the records
    that have not already been included or omitted after the last
    /OMIT qualifier are included. You can unconditionally omit any
    records not previously omitted or included by specifying the
    /OMIT qualifier only.