Opencart

Feed Templates:

The templates can be used directly, but it's better to modify them for the specific store requirements.
Examples All Templates Ceneo
Heureka
Idealo
Kelkoo
Yandex
Paramaters

Upload the parameters.php file into your template folder (from version 5.0.2), or use these recommend URL feed parameters:

Heureka.xml: &availability_in_stock=0&availability_out_of_stock=exclude!&availability_disabled=exclude!
Yandex.xml: &availability_in_stock=true&availability_out_of_stock=false&availability_disabled=exclude!
Kelkoo.xml: &availability_in_stock=1&availability_out_of_stock=exclude!&availability_disabled=exclude!
Idealo.csv: &availability_out_of_stock=exclude!&availability_disabled=exclude!&remove_char=%22
Ceneo.xml: &availability_in_stock=1&availability_out_of_stock=exclude!&availability_disabled=exclude!&html_entities_url=1