interface_build {
    {v.trim} 0
    {Trims small spurs and removes excessive nodes from binary GRASS vector map.}
    {entry input {Input vector map:} 0 vector}
    {entry output {Output vector map:} 0 vector}
    {entry factor {Trimming value (0-100) [10]:} 0 ""}
    {checkbox -i {Threshold value in inches.} "" -i}
}