destination document

基本解释

If the destination document has the entity defined, its value is assigned.
如果目标文档定义了实体，则给它赋值。
Instead, it creates a clone of the source node and its descendents that you can then insert into the destination document.
相反，它先创建源节点及其下属节点的一个克隆版本，再将这个克隆版本插入到目标文档中。
One characteristic of TRANSer is that it allows multiple source XML documents to map to the destination XML document which can be created or edited when designing.
它允许多个源XML文档映射到目标XML文档，还可以在设计映射关系的同时创建和修改目标XML文档的格式。