On the “Mapping” tab you can choose whether you want to send the mapping file to the XML Merger component via an input (in this case, the component has an input "Mapping file", to which the file has to be sent during the workflow) or if you want to load a mapping file into the component. In the second case, the content of the mapping file will be stored within the workflow, which will lead to a larger workflow file. Editing the mapping content allows you to edit and store the corresponding content in the workflow (the originally loaded file itself will not be changed).
You can define the scheduling of the static input channels on the tab “Inputs/Outputs”. You are also able to add dynamic input or output channels here. Thus it is possible to map single values into the XML dataset via XPATH declaration. Moreover, you can select single values in order to write them in an output channel.