English to Swedish Social Sciences International Org/Dev/Coop

In the introductory part of an article about a future tunnel from Sweden to Germany, I came across the following sentence:
"Cooperation on innovation, best practice governance and energy were among the major themes, but the one that received the most attention was the possibility of the construction of High Speed Rail (HSR) infrastructure between Oslo and Berlin."

I would very much appreciate a translation of this term, so -Thank you!