question: @ Override public void error ( String domain , String key , XMLParseException exception ) throws XNIException { if ( fErrorHandler != null ) { SAXParseException saxException = createSAXParseException ( exception ) ; try { fErrorHandler . error ( saxException ) ; } catch ( SAXParseException e ) { throw createXMLParseException ( e ) ; } catch ( SAXException e ) { throw createXNIException ( e ) ; } } }
target:  Reports an error. Errors are non-fatal and usually signify that the document is invalid with respect to its grammar(s).