digraph graph1 {
    graph [pigScript=" A = LOAD 'tmp' as (field1: int, field2: float, field3: chararray ) ; B = DISTINCT A ; "] ;

    node [schema="field1: int, field2: float, field3: chararray"] ;

    load [key="10", type="LOLoad"] ;
    distinct [key="20", type="LODistinct"] ;

    load -> distinct ;
}