.. _vnx.opc_ua.DataChange: vnx.opc_ua.DataChange ===================== .. cpp:namespace:: vnx::opc_ua::DataChange Class ----- `DataChange` reports data changes for a :ref:`vnx.opc_ua.monitored_item_t` as part of a :ref:`vnx.opc_ua.subscription_t` to an OPC-UA server. Fields ------ .. cpp:member:: int subscription_id .. cpp:member:: int monitored_item_id .. cpp:member:: Variant value The new value of the item.