http://www.hydratec.nl/vs1/ Hydratec_RP_2021 This is an extension taxonomy created for reporting Hydratec's annual report. vs1 Hydratec Int.NV www.hydratec.nl NL 2021-09-14 Hydratec_EP_2021 Elements, presentation tree calculation tree and dimension relationships for preparing Hydratec's annual report. vs1 en nl