[Haskell-cafe] Re: [Haskell] state of HaXml?

Donald Bruce Stewart dons at cse.unsw.edu.au
Wed Dec 27 18:18:04 EST 2006

> I have some XML things to take care of, and I had hoped to use
> a nice functional language with combinators.  But I'm having
> trouble getting HaXml to do anything useful.  Here is a program
> that I wrote just to read in the XML and prettyprint it.
> But it fails with an error message.  The 'expat' tool 'xmlwf'
> claims the XML is well formed, and the XML was generated from
> gpsbabel, a tool I trust to behave properly.  And yet:
>   : nr at curlycoat 10429 ; xmlwf 2006-12-27-backup.gpx
>   : nr at curlycoat 10430 ; $AWD/Main 2006-12-27-backup.gpx
>   Main: Parse error: unexpected EOF
> Here is Main.hs: 
>   module Main where
>   import qualified Text.XML.HaXml as X
>   import qualified Text.XML.HaXml.Parse as XP
>   import qualified Text.XML.HaXml.Pretty as XPP
>   import qualified IO
>   import qualified System
>   load :: String -> IO X.Document
>   load fn = do handle <- IO.openFile fn IO.ReadMode
>                contents <- IO.hGetContents handle
>                IO.hClose handle
>                return $ XP.xmlParse fn contents
>   main = do [xml] <- System.getArgs
>             d <- load xml
>             IO.putStrLn $ show $ XPP.document $ d
> I'm using HaXml version 1.13.2-5 as distributed by Debian,
> with GHC 6.6.
> Does anyone have thoughts or suggestions?  Is there software I should
> prefer to HaXml?  (I notice that HaXml does not understand XML Schema,
> which I seem to be stuck with...)

You might also want to have a peek at HXT, the XML toolbox. That's been
used to good effect recently, for a little RSS aggregator:

-- Don

P.S. Redirected to the -cafe

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