character: "vector" or "raster", anything else will return all
drivers.
regex
character; regular expression to filter the name and long_name
fields on
Details
The drivers available will depend on the installation of GDAL/OGR,
and can vary; the st_drivers() function shows all the drivers that are
readable, and which may be written. The field vsi refers to the driver's
capability to read/create datasets through the VSI*L API. See GDAL website for additional details on driver support.