swift&swiftml

hi,
I would like to know what all validations and formats are being used in swiftML.
I would like to make it clear..
while sending messages in SWIFT,using swiftML,
what are the maximum length and value the fields like amount,a/c name should hold?
does this follows as that of swift?
if yes,is there any place where they are stating it..
if not,where they are stating it for Swift
expecting ur reply
thanx in advance