By this point , xml programmers probably have noticed that the pseudo - query syntax looks a lot like xpath the xml path language , and the procedural pseudo - code looks a fair amount like dom document object model 这时, xml程序员可能已经注意到伪查询语法看上去非常象xpath ( xml path语言) ,而过程化伪代码看上去则与dom (文档对象模型)相当类似。