It should be pretty easy doable with the included tag_processor? In classic it is still time-series experimental, in UMH-core it is the default. You can work with conditions for example. The metadata is described in our docs under benthos-UMH (docs.umh.app) here are some examples: https://docs.umh.app/benthos-umh/processing/tag-processor This

tag_processor:
        defaults: |
          msg.meta.location_path = "enterprise.site.area.line1";
          msg.meta.data_contract = "_historian";
          msg.meta.virtual_path = msg.meta.opcua_tag_path;
          msg.meta.tag_name = msg.meta.opcua_tag_name;
          return msg;

This will put the entire folder structure of your OPC UA server into the asset "enterprise.site.area.line1" now you can also add conditions if you want to overwrite certain things, but check out hte documentation