对于丢失了的响应需要某种旧数据的过期机制。
Some mechanism of expiring old data may be required for lost responses.
这种方法唯一的缺点是：有获得旧数据的轻微的风险。
The only drawback to this approach is the slight risk of getting stale data.
请把XI看作将旧数据导入最新xml流的一般工具箱。
Think of XI as a generic toolkit for importing your legacy data into a modern XML flow.
应用推荐