New Features
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     The replaceable driver lets you create and maintain (.ntx) files using
     features above and beyond those supplied with the previous DBFNTX
     driver.  The new indexing features are supplied in the form of several
     syntactical additions to the INDEX and REINDEX commands.  Specifically
     you can:

     .  Specify full record scoping and conditional filtering using
        the standard ALL, FOR, WHILE, NEXT, REST, and RECORD clauses

     .  Create an index while another controlling index is still
        active

     .  Monitor indexing as each record (or a specified record number
        interval) is processed using the EVAL and EVERY clauses

     .  Eliminate separate coding for descending order keys using the
        DESCENDING clause