Joseph Doherty
8730c6e30a
Add design doc for a second data-connection protocol, MxGateway, alongside the OPC UA client. New IDataConnection adapter behind the existing DataConnectionFactory extension point; tag pipe (read/subscribe/write) plus Galaxy hierarchy browse, optional 2nd endpoint for failover. Generalizes the OPC-UA-named browse plumbing to protocol-agnostic browse via IBrowsableDataConnection. No entity/schema changes.