Perl XML::LibXML $node->findnodes($xpath)找到它不应该找到的节点。

Here's some code I am having problems with, I process some XML and in a method in an OO class I extract an element from each of several nodes that repeat in the document. There should only be one such element in the subtree for each node but my code gets all elements as if it is operating on the document as a whole.Here's some code I am having problems with, I p