This allows you to specify what to do if the same journey is returned from ATPCO and NDC channels. By default, the cheaper will stay. In the case of a tie, the previously described solution will be in place.
With this attribute, you can indicate “show me everything, combine ATPCO and NDC fares as additional fares, regardless of whether they are the same price.”
You can use this for a single NDC fare or multiple, the same for APTCO, both single and multiple.
Combine solutions from different services/sources as additional fares.