FND_KEY_FLEX. DEFINE (
BLOCK=& gt;
The FIELD=& gt;
CODE=& gt;
APPL_SHORT_NAME=& gt;
NUM=& gt;
ID=& gt;
DINSERT=& gt;
VRULE=& gt;
DATA_SET=& gt;
The COLUMN=& gt;
The REQUIRED=& gt;
VALIDATE=& gt;
WHERE_CLAUSE=& gt;
USEDBFLDS=& gt; );

Can someone explain to me the key elastic defined the function of each parameter represents what is, how to assign a value can have what effect