dom dom3 ASModel dom3 DOMASBuilder dom3 DOMASWriter dom3 DOMImplementationAS parsers DOMASBuilderImpl w3c dom DOMException w3c dom DOMImplementation asdomimplementationimpl domimplementationimpl domimplementationas asdomimplementationimpl singleton asdomimplementationimpl domimplementation getdomimplementation singleton asmodel createas isnamespaceaware asmodelimpl isnamespaceaware domasbuilder createdomasbuilder domasbuilderimpl domaswriter createdomaswriter msg dommessageformatter.formatmessage dommessageformatter.dom_domain domexception domexception.not_supported_err msg