Mobility imposes new requirements to the event architecture : disconnections and frequent changes in the topology of subscribers need to be supported 移动性为事件架构带来了新的需求：断开和在拓补中频繁改变的订阅者需要被支持。
Duration ; survival - this agreement remains in effect for so long as subscriber has the ability to receive market data as contemplated by this agreement 持续；效力?只要订阅者有能力收取本协议所指定的资场资料，本协议维持有效。
Once the package is imported , the user can drag and drop the package on multiple servers listed as subscribers for the distributed software 当包被导入后，用户可以在多个被列为被发布软件的订阅者的服务器列表中进行添加和删除的操作。
