Upgrade BW 3.5 to NW7.4 - Dataflow

Hello together,

we want to upgrade from NW2004s to NW7.4.

I don't know if the old BW 3.5 dataflow of the BI Content -for example CO-PA- will automatically upgade to a newer one.

Otherwise: Have we to build manually the dataflow?

Do you have a SAP link?

Thanks