Some of the tools ask you to specify the format of output tables
The output formats described below are supported; in some cases there
are variants or options for the basic formats as documented.
If you don't specify an output format explicitly,
STILTS will try to guess what format to write based on the
output filename; the details of those rules are also documented below.
It is also possible to add new formats at runtime using the
startable.writers system property,
or by setting the format to the classname of a