在Flex中使用RDF / XML文档是否存在“标记搜索”方法？

I'm working on a RDF file in my application. I loaded it with the URLLoader and I've imported flash.xml.* class in order to manipulate the content of my RDF file. I need to count certain tags ("Description") in an efficient way. The number of the tags I'm searching for is variable and now I'm using a combination of methods firstChild, lastChild, nextSibling in while cicles in order to take the informations I need from the document. My question is if there's a more direct and general "search method" that helps me avoid that complex and not elegant search that I made. The syntax @Property is used to directly access a Tag's property, right? Do you think that it could be useful for me to solve my problem? Thank you all for the helpI'm working on a RDF file in my application. I