interface_build {
    {d.vect.line} 0
    {Draw labelled vector lines to the current display.}
    {entry map {Vector map, required:} 0 vector}
    {entry color {Line color [white]:} 0 color}
    {entry catnum {List of category numbers to restrict drawing:} 1 ""}
    {entry legend {Use a legend file:} 0 file}
}