一篇老外写的论文中有这么一句话 there will be many individual devices that will use a proprietary protocol – LonWorks, Metasys, Modbus, or something else. 还有一篇老外写的论文中有这么一句话 For this to happen, the infrastructure must meet certain criteria. It must: 1. Support multiple open control system protocols, such as BACnet, LonWorks, Modbus, 到底Lonworks是专用（proprietary ）协议还是开放（open ），好像老外也没弄清楚。我现在也很胡涂。 大家又何见解，请发表。