A gate is merely a message that is illustrated with one end connected to the sequence diagram's frame's edge and the other end connected to a lifeline.
一个门只是一个消息，图形表示为一端连接序列图的框架边缘，另一端连接到生命线。
2
The db2-fn: xmlcolumn is a function that retrieves a sequence from an XML column in the db2 database currently connected.
db 2 - fn： xmlcolumn函数从当前连接的db 2数据库中的xml列获取一个序列。
3
By connecting these towers a sequence of voids is created, connected to the desired economical continuous route of shopping.