When you see a reference to ZPL in InterFormNG2, then it actually means ZPLII.
ZPL is one of the file types/payloads, that can be handled by the InterFormNG2 workflow.
ZPLII is the printer language used, if you configure a printer in InterFormNG2 to use the mime type ZPL.
For normal printing you should consider the Print component in the workflow.
Please notice the special ZPL settings, when you setup a printer to use ZPL.
ZPL can also be the payload in the workflow, if you use the component, Create ZPL document. You can then freely choose, if you e.g. want to store the ZPL file in a folder with the To filesystem component or if you want to later set the printer and then finally print it out with the To printer component like for PCL.
