def xsd_error_as_simple_string(error):
    """
    Returns a string based on an XSD error object with the format
    LINE:COLUMN:LEVEL_NAME:DOMAIN_NAME:TYPE_NAME:MESSAGE.
    """
    parts = [
        error.line,
        error.column,
        error.level_name,
        error.domain_name,
        error.type_name,
        error.message
    ]
    return ':'.join([str(item) for item in parts])