Principle: After the message is sent in Orchestration, it may be necessary to wait for further processing. When the actual processing is possible, it is possible to send multiple messages at the same time, and then waits for the return of multiple responses. Each send message And the message of the response establishes a corresponding relationship, BizTalk implements the mechanism through orchestration correlatoin. The key is to send the message and the received message. If you need to be associated, you need to specify a critical child, and you can implement the Correlation by associating this keyword. The concept of Hydration (water), Dehydration (dehydration) in the implementation of the Correlation, that is, the message that needs to wait for a long-standing response will be saved to the database, reducing the loss of waiting messages on memory.
