return the system identifier for the location . a file name must always be provided as a file : ... url . concode_field_sep String systemId concode_elem_sep int columnNumber concode_elem_sep long serialVersionUID concode_elem_sep int lineNumber concode_field_sep int getLineNumber concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep int getColumnNumber concode_elem_sep String toString
String function ( ) { return systemId ; }