Hello, I have a function that returns its value in a monad, and I'd like to use that value in a function that returns an arrow, but I cannot figure out how to do that. The monad in this case is CouchMonad and the arrow is ArrowXml, but I guess that doesn't really matter. For example, the function that returns its value in a monad: toXNode :: String -> CouchMonad XNode and a function that returns an arrow: processReplacement :: (ArrowXml a) => String -> String -> a XmlTree XmlTree In processReplacement I'd like to get a value from toXNode function, take it out from the monad and use the plain XNode value. Were it all simply CouchMonad, it would be something like this: processReplacement elementId docId = do node <- toXNode docId setNode node `when` idMatches elementId But this is an arrow, so I need something different. I've read quite a few arrow articles and tutorials, but couldn't yet grasp how to do this and what is involved. Any ideas or pointers to examples? Thanks! BR, Jarno