Aggregating server, comprising: a remote node input interface, configured to receive node images representing nodes (150, 152, 154, 156) in a remote address space, wherein the node images are structured node data of the nodes (150, 152, 154, 156) in a remote address space; an address space description interface, configured to import node description information comprising node descriptions of nodes (151, 153, 155) in the remote address space to be aggregated and to provide the node description information to a node filter, wherein the address space description interface is a file interface; the node filter located between the remote node input interface and an aggregation module, configured to filter the node images received from the remote node input interface according to the imported node description information of nodes (151, 153, 155) in the remote address space to be aggregated; wherein the node filter comprises filter information; wherein the filter information is the imported node description information related to a technical application for each of the nodes in the remote address space that are to be aggregated, and wherein the filter is configured to keep only those images, which are contained in the received node description information; and the aggregation module, configured to instantiate proxy nodes (104, 106, 108), wherein the proxy nodes represent filtered node images of nodes in the remote address space; and wherein the proxy nodes are provided to an external client; wherein the aggregating server is an Open Platform Communications Unified Architecture - OPC UA- aggregation server. a remote node input interface, configured to receive node images representing nodes (150, 152, 154, 156) in a remote address space, wherein the node images are structured node data of the nodes (150, 152, 154, 156) in a remote address space; an address space description interface, configured to import node description information comprising node descriptions of nodes (151, 153, 155) in the remote address space to be aggregated and to provide the node description information to a node filter, wherein the address space description interface is a file interface; the node filter located between the remote node input interface and an aggregation module, configured to filter the node images received from the remote node input interface according to the imported node description information of nodes (151, 153, 155) in the remote address space to be aggregated; wherein the node filter comprises filter information; wherein the filter information is the imported node description information related to a technical application for each of the nodes in the remote address space that are to be aggregated, and wherein the filter is configured to keep only those images, which are contained in the received node description information; and the aggregation module, configured to instantiate proxy nodes (104, 106, 108), wherein the proxy nodes represent filtered node images of nodes in the remote address space; and wherein the proxy nodes are provided to an external client; wherein the aggregating server is an Open Platform Communications Unified Architecture - OPC UA- aggregation server.