I'm using XML::Twig to parse small XML files read from a database. I want to copy the data from one database to another if it's not already there. If it's there I'd like to get information whether the data in the target DB is the same or different from the data in the source DB. With same I mean: It's the same structure and all the attributes are the same and have the same values. I want to ignore whitespace, comments and text. Don't post code how to do it. Please just tell me whether there are modules being able to do that.