SWIFT MT field format rules [closed]

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Can someone point me to a document where the formatting rules for a MT message field are described?

For example I want to 开发者_StackOverflow中文版know what the following snippet means.

:4!c//3!a/3!a/15d

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This is described in the MT 'General Information' documentation. You can find the 2017 edition of this document here. Specifically, check out section 6.1 for an explanation.

How to read :4!c//3!a/3!a/15d:

• first :
• then 4 mandatory c
• then //
• then 3 mandatory a
• then /
• then 3 mandatory a
• then /
• then maximum 15 d

A brief overview of the character types in regex:

• c is [A-Z0-9]
• a is [A-Z]
• d is \d+,\d*

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How to read :4!c//3!a/3!a/15d:

first :
then 4!c = must be 4 character "c"
then // is an empty field.
then 3!a = must be 3 character "a"
then /
then 3!a = must be 3 character "a"
then /
then maximum 15d is max 15 character include decimal

A brief overview of the character types in regex:

c is [A-Z0-9]
a is [A-Z]
d is (0-9) max 15 character include decimal

for example : You will fill price field (90a)

:90B::4!c//4!c/3!a15d

then you can fill = :90B::DEAL//ACTU/EUR1000,5