attribute unsigned short code; 

const unsigned short CONSTRAINT_ERR = 3; 

const unsigned short DATA_ERR = 4; 

const unsigned short DEADLOCK_ERR = 33; 

attribute DOMString message; 

const unsigned short NON_TRANSIENT_ERR = 1; 

const unsigned short NOT_ALLOWED_ERR = 5; 

const unsigned short NOT_FOUND_ERR = 2; 

const unsigned short RECOVERABLE_ERR = 21; 

const unsigned short SERIAL_ERR = 11; 

const unsigned short TIMEOUT_ERR = 32; 

const unsigned short TRANSIENT_ERR = 31; 

const unsigned short UNKNOWN_ERR = 0;