Do you have linked documents in your content tree and you want to list them using a transformation? If you would rather get their original path instead of the linked path, please use the following code to get the original location:
<%# CMS.CMSHelper.CMSContext.GetDocumentUrl(CMS.DocumentEngine.DocumentHelper.GetDocument(CMS.GlobalHelper.ValidationHelper.GetInteger(Eval("NodeLinkedNodeID"), 0), CMSContext.PreferredCultureCode, new CMS.DocumentEngine.TreeProvider()).DocumentID) %>