I've been looking for an enterprise-grade XML library. My standard for comparison is Python's lxml library (a wrapper around libxml2 and libxslt). The only thing I've found that's even close is hxt, and it falls a bit short. Specifically, when I feed it invalid XML, I get this error: error: The content of element "school" must match ( "author"* ). Element "author" expected, but element "auther" found. error: Element "auther" not declared in DTD. Whereas from lxml I get: lxml.etree.XMLSyntaxError: No declaration for attribute name of element auther, line 24, column 19 This is shorter and clearer, and identifies the location of the error. It does have better error messages for ill-formed XML. Is there a library with a validating parser that provides better quality error messages? It also seems like mapping an XML Schema into a collection of Haskell types should be a function of the library. Is there on that does that, or is this completely untenable?