mydata/...
mydata/chap01/...
mydata/chap01/data1_1.csv
mydata/chap01/data1_2.csv
mydata/chap01/table1_1.csv
mydata/chap01/table1_2.csv
mydata/chap01/table1_3.csv
mydata/chap01/table1_4.csv
mydata/chap02/...
mydata/chap02/data2_1.csv
mydata/chap03/...
mydata/chap03/data3_2.csv
mydata/chap04/...
mydata/chap04/data4_1.csv
mydata/chap04/data4_1_1.csv
mydata/chap05/...
mydata/chap05/data5_1.csv
mydata/chap06/...
mydata/chap06/data6_1.csv
mydata/chap07/...
mydata/chap07/data7_1.csv
mydata/chap ...