Data transfer from attribute to node
Currently i am working with File upload.In a pop window i kept the file upload UI element.User can upload one file at a time through that UI element in pop up window.But my requirement is to upload multiple files at one button click. For that I need to append the values from File upload UI element context to a node. In that node i need to append the values one by one.
How to append values one after the other in node from a context attribute which is having single input at a time.