Hi @DataD, Please find the below spec: [ { "operation": "shift", "spec": { "rows": { "*": { "row": { "*": { "@": "[&3].@(3,header[&1])" } } } } } } ] This will give the output as: [ { "header1" : "row1", "header2" : "row2", "header3" : "row3" }, { "header1" : "row4", "header2" : "row5", "header3" : "row6" } ] I didn't convert it to  { "header1" : "row1", "header2" : "row2", "header3" : "row3", "header1" : "row4", "header2" : "row5", "header3" : "row6" } because that is not a valid json as header1,2 and 3 are repeated keys in the same level of the json. ... View more