This is a gateway.xml file containing links to example offer in the IOF for Shops ver. 2.6 format. That offer is defined in the same file package as in "XML" folder which is a part of the IOF for Shops ver. 2.6 Technical Specification.

To import an example offer using the IAI Downloader, you need to configure access data in "Settings" tab. After this step, click on "Add", and next "Add offer" button. Choose option "Select local file" and click "browse" button. Find and choose the gateway.xml file. Click "OK". 

Now, You can configure import options.

Good luck!

IdoSell.com Technical Support