How can I print double-sided with ipptool?

I am using the comming line ipptool for printing, which is a low-level tool in the CUPS daemon for internet printing. IPP is a HTTP-based protocol for internet printers, most current LAN-based office printers are supporting it. I used the following command for print: ipptool -tv -f /path/to/my.pdf ipp://myprinter.on.mylocal.net/ipp/ printfile.ipp Where my printfile.ipp defines the characteristics/capabilities of my printer, as follows: { OPERATION Print-Job GROUP operation-attributes-tag ATTR charset attributes-charset utf-8 ATTR language attributes-natural-language en ATTR uri printer-uri $uri FILE $filename } What I know for sure: 1. Single-sided PDF printing is working seamlessly. 2. The printer is a relative ordinary HP office printer, 3. Which is capable to print double-sided without any problem (co-workers with Windows can do that). I found this printfile with google and seems working, however any deeper digging about its exact format and specification resulted only cloudy specs and docs. Even the name of the file format of this IPP file is unclear for me. How could I make it to print double-sided?