dqm_persistency::PParameter Node1 dqm_persistency::PParameter + name + input + result + algorithm + reference + weight + disableChildren + metadata + shape + parentRegion + PParameter() + ~PParameter() + Print() + GetParentRegion() Node3 dqm_persistency::PRegion + subparameters + layout + PRegion() + ~PRegion() + Print() + AddSubparameter() + GetSubparameter() Node1->Node3 Node2 TNamed Node2->Node1