BeginString <8> field – FIX 4.3 – FIX Dictionary

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FIX 4.3 : BeginString <8> field
Type: String

Identifies beginning of new message and protocol version. ALWAYS FIRST FIELD IN MESSAGE. (Always unencrypted)

Valid values:

FIX.4.3

FIX 4.3 : BeginString <8> field