subsetting a vector

To select a zone of raster map in grass we just need
to define the region and then

r.mapcalc "new.map = old.map"

Is there any way to do the same with a vector?
I have a very large vector of coastlines and I'm
interested only in one particular region.

alobo@eno.princeton.edu
***************************************************

There is a shell programs v.clip.sh that will clip a region defined with d.zoom
.
This should be available on the moon ftp site. Another grass program, v.cutter
clips vectors with a "cookie cutter" vector input map.

Bill Jackson
LL-N
USA-CERL