cmarkup是一个简易的xml解释器，但免费版的cmarkup的功能受到很大的限制，比如层次遍历非常困难，这里将提供几个函数，补上这些功能-cmarkup is a simple xml parser, but the free version is very much the cmarkup restrictions, for example, very difficult to traverse the level, this will provide a number of functi