MDEntryTime vs TransactTime in MarketDataIncrementalRefresh

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Imported from previous forum

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[ original email was from Mikael Brannstrom - mikael.brannstrom@ngm.se ]
In the MarketDataIncrementalRefresh message, what is the difference between TransactTime and MDEntryDate+MDEntryTime? The only difference I can see is the data types. Is there any semantic difference?

Why does TransactTime not exist in the MarketDataSnapshotFullRefresh message?

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The previous reply has apparently been withdrawn as TransactTime does exist in MDIncGrp. It has been added for FIX 5.0 SP1 to convey extended trade details including the time of execution. MDEntryDate/Time relate to the distribution of this information not to the underlying event (an execution). The requirement at the time was to distribute trades with the incremental message. There is no reason not to add it to the snapshot message as well if there is a requirement.

For details have a look at the GTC website under http://www.fixprotocol.org/documents/3292/FIX%20Protocol%20Gap%20Analysis%20-%20OMX%20Market%20Data%20Req%26%2339%3Bs%200.43.doc.

In the MarketDataIncrementalRefresh message, what is the difference
between TransactTime and MDEntryDate+MDEntryTime? The only difference I
can see is the data types. Is there any semantic difference?

Why does TransactTime not exist in the
MarketDataSnapshotFullRefresh message?

4

[ original email was from Mikael Brannstrom - mikael.brannstrom@ngm.se ]
Thanks Hanno.
/Mikael

The previous reply has apparently been withdrawn as TransactTime does
exist in MDIncGrp. It has been added for FIX 5.0 SP1 to convey extended
trade details including the time of execution. MDEntryDate/Time relate
to the distribution of this information not to the underlying event (an
execution). The requirement at the time was to distribute trades with
the incremental message. There is no reason not to add it to the
snapshot message as well if there is a requirement.

For details have a look at the GTC website under//www.fixprotocol.org/documents/3292/FIX%20Protocol%20Gap%20Analysis%20-
%20OMX%20Market%20Data%20Req%26%2339%3Bs%200.43.doc.

In the MarketDataIncrementalRefresh message, what is the difference
between TransactTime and MDEntryDate+MDEntryTime? The only difference
I can see is the data types. Is there any semantic difference?

Why does TransactTime not exist in the MarketDataSnapshotFullRefresh
message?