Hi Jimmy, Doesn't xpPair [0] do what you want? Then afterwards, use `xpWrap` to convert the pair(s) to your custom data type. Erik [0] http://hackage.haskell.org/package/hxt-9.3.1.10/docs/Text-XML-HXT-Arrow-Pick... On Mon, Jan 5, 2015 at 12:15 AM, Jimmy Lu wrote:

Hi,

With xml element having DTD like following:

<!ELEMENT entry ((art*, formula?, table?), hw, hsl?, (pr | altpr)?, (ahw, hsl?, (pr | altpr)?)*, vr?, fl?, lb*, in*, ((dx) | (cx?, def?))?, dro*, dxnl*, uro*, syns*)>

I want to unpickle the sequence

hw, hsl?, (pr | altpr)?, (ahw, hsl?, (pr | altpr)?)*

into Haskell data type [Headword] where

data Headword = Hw { hwText :: String , hwSl :: Maybe String , hwPr :: Maybe Pronunciation }

However in the hxt pickle API I cannot found a way to extract a sequence of adjacent elements. Is there any one knowing how to do it?

Thanks,

Jimmy Lu _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe