Someone asked what SXMB stands for. You see this pattern in the transactions used on SAP XI systems. It turns out that the XI system was internally known as Exchange Message Broker before it was released and S means that the object belongs to the basis component. The newer transactions, however, contain XI (for example SXI_CACHE). I know it is of no use to know what XMB stands for, but this question will be on almost every XI consultant's mind.