[[source_files]]
name = "foo1.csv"
delimiter = ","
fields = [ { source_name = "a", field_type = "Unsigned", add_to_frame = true } ]

[[source_files]]
name = "foo2.tsv"
delimiter = "\t"
fields = [ { source_name = "b", field_type = "Signed", add_to_frame = true },
           { source_name = "c", field_type = "Float", add_to_frame = true } ]

[[transforms]]
method = { action = "Concatenate",  separator = "!!" }
source_fields = [ "a", "b" ]
target_name = "cat_ab"

[[transforms]]
source_fields = [ "c" ]
target_name = "map_c"

[transforms.method]
action = "Map"
default_value = "-1"
map = { "M" = "0", "F" = "1" }