The Haskell XML Toolbox uses a generic data model for representing XML documents including the DTD subset and the document subset. It contains a validating XML parser, an HTML parser, namespace support, an XPath expression evaluator, an XSLT library, a RelaxNG schema validator and functions for serialization and deserialization of user defined data. After uninstalling, run this command to unregister the package from the ghc package database: ghc-pkg recache