Hi, Bill Thanks for your comments. I

Hi, Bill Thanks for your comments. I am actually reading your series, but still I have problems grasping the concepts. I started writing a blog about my frustration and documented the process about how I resolved those frustrations. Somehow, I don't think your example and illustrations are sufficient in resolving some of the difficulties arising from learning MDX. My blog can be found here (http://jiangningtang.spaces.live.com/blog/cns!90A00B80F75CB859!347.entry. And after this process, I started to have a crystal clear picture about hierarchy, members, children, descendants, ancestor(s).