What is SQL Standard: ISNUL()L, IFNULL() ?

[Holly Chamberlain]

Hi Group,
Does anyone have a good site that contains the current SQL standard? Or
does anyone know is ISNULL() and IFNULL(), and similar null testing
functions, standard SQL or extensions to SQL?
 
Thanks! I'm porting from Sybase SQLAnywhere to MySQL and just found what
worked in Sybase (ISNULL()) now appears to have to be IFNULL() --- this
is a real bummer because I didn't want to have to change ANY of my
application code..
 
Thanks!
Holly