As a reminder,
on Sunday, November 4, 2007, Daylight Savings
Time (DST) will end at
2:00 a.m. Please be aware that for the
first week only after the change takes effect and through the market close on November 9,
the DST time change
will not be updated within the MDP Wire Message
Format/Message Timestamp field. (This format precedes the actual RLC and ITC 2.1
Message Specifications).
MDP Wire Message Format/Message Timestamp
Field
As shown in the following MDP Message Wire Format
illustration, the Message Timestamp uses 12:00 a.m. Sunday as its reference time. Even though the DST change will take place on
Sunday,
November 4, this information will
not
be reflected in the Message Timestamp
until the
following Sunday, November 11.
|
Field
|
Length
|
Description
|
|
HEADER
|
|
Message Sequence Number
|
4 bytes (binary)
|
This represents the sequence number of the
message within the published channel.
|
|
Message Timestamp
|
4 bytes (binary)
|
This represents a timestamp for the publishing of
the message. It is represented as the number of milliseconds since Sunday, 12 A.M. (00:00).
|
|
Message Body length
|
2 bytes (binary)
|
This represents the length of the message body
field.
|
|
BODY
|
|
Message Body
|
|
RLC – Compressed
ITC 2.1– Plain text
|
If you have any questions on Sunday, November 4,
2007, please contact
CME Enterprise Computer Operations at
312.930.8160
.
Thank you.
|