In Oracle Forms, purpose of the Built-in Validate

Can any one please explain clearly (if possible with example) the purpose of the Built-in Validate in Oracle Forms..?
Thanks..

item scope will trigger the current item validation process. record scope will do the same but for all items of the record, block scope will trigger all validations in the curent block and form scope will execute every validation processes for the entire form.
I don't know how I can be more clear than that.
Francois

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Edited by: user2938447 on Nov 8, 2010 9:12 PM
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Error 103 at line 14
Encountered the symbol "(" when expecting one of the following
a PL/SQL variable or double quoted string
an expanded name
an expanded name link
a table reference __expression
a key word
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