export [-flNnR] [-r rev|-D date] [-k subst] [-d dir]This command requires that you specify a date or tag (with `-D' or `-r'), so that you can count on reproducing the source you exported.
`-D DATE'
Use the most recent revision no later than DATE.
`-f'
If no matching revision is found, retrieve the most
recent revision (instead of ignoring the file).
`-R'
Export directories recursively. This is on by default.
`-r TAG'
Use revision TAG.
`-d DIR'
Create a directory called DIR for the working files,
instead of using the module name.