Message Exchange Patterns
Module for AS4 supports the following one-way and two-way MEPs:
One-Way:
![*](chapterTOC_bullet.png)
One-Way/Push
![*](chapterTOC_bullet.png)
One-Way/Pull
![*](chapterTOC_bullet.png)
Selective-Pull
Two-Way:
![*](chapterTOC_bullet.png)
Two-Way Sync
![*](chapterTOC_bullet.png)
Two-Way/Push-Pull
![*](chapterTOC_bullet.png)
Two-Way/Push-Push
Module for AS4 can be used in the role of an initiating MSH or a responding MSH.