stream :f 'file.xml' :F '/dev/null'
    select elt {
        echo :s (Book) {"\t"}
                (Snap) {"\t"}
                (Line1) {"\t"}
                (Line2) {"\t"}
                (Line3) {"\t"}
                (Line4) {"\t"}
                (Line5) {"\t"}
                (Rating/C1) {"\t"}
                (Rating/C2) {"\t"}
                (Rating/C3) ;
    } select Author {
        echo (.) ;

    } select Publisher {
        echo (.) ;

    } ;