TagField NameXML NameData TypeUnion DatatypeDescriptionAddedDepr.Enums from tag
8BeginString(not used in FIXML)String

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

Valid values:

FIXT.1.1



Added  FIX.2.7

Used in messages:

Used in components:
[StandardHeader]