[This message was posted by Michael Wong of Chi-X Global Technology
<[email protected]> to the "FAST Protocol" discussion forum at
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Rolf,
Here is the template for this message
<template name="BookSnapshot" id="100" dictionary="Book">
<typeRef name="MarketDataSnapshotFullRefresh"/>
<string name="BeginString" id="8"> <constant value="FIXT.1.1"/> </string>
<string name="MessageType" id="35"> <constant value="W"/> </string>
<string name="ApplVerID" id="1128"> <constant value="7"/> </string>
<!-- 7: FIX50 -->
<string name="SenderCompID" id="49"> <copy/> </string>
<string name="TargetCompID" id="56"> <constant value="SWXGROUP-MDC"/>
</string>
<uInt32 name="MsgSeqNum" id="34"> <increment/> </uInt32>
<string name="PossResend" id="97"><copy value="N"/></string>
<string name="SendingTime" id="52"> <tail/> </string>
<uInt32 name="MDBookType" id="1021"><copy/></uInt32>
<uInt32 name="MDFeedType" id="1022" presence="optional"><constant
value="0"/></uInt32>
<string name="SecurityID" id="48"> <tail/> </string>
<string name="SecurityIDSource" id="22"> <constant value="4"/> </string>
<sequence name="MDEntries">
<typeRef name="MDFullGrp"/>
<length name="NoMDEntries" id="268"/>
<string name="MDEntryType" id="269"> <copy value="0"/> </string>
<decimal name="MDEntryPx" id="270" presence="optional">
<exponent><copy value="-2"/></exponent>
<mantissa><delta/></mantissa>
</decimal>
<decimal name="MDEntrySize" id="271" presence="optional">
<exponent><copy value="0"/></exponent>
<mantissa><delta/></mantissa>
</decimal>
<string name="TradingSessionID" id="336"> <copy/> </string>
<string name="OpenCloseSettlFlag" id="286"
presence="optional"><constant value="5"/></string>
<uInt32 name="NumberOfOrders" id="346" presence="optional"> <delta
value="1"/> </uInt32>
<uInt32 name="NumberOfQuotes" id="6566" presence="optional"> <delta
value="1"/> </uInt32>
<uInt32 name="MDPriceLevel" id="1023" presence="optional"><increment
value="1"/></uInt32>
<uInt32 name="ReferencePriceType" id="6567" presence="optional">
<copy value="3"/> </uInt32>
<uInt32 name="RptSeq" id="83" presence="optional"> <copy/> </uInt32>
</sequence>
</template>
Michael
> Michael,
>
> the length field occupies a bit in the message pmap if there is an
> operator specified for the length field of the sequence.
>
> I don't have the FAST spec in front of me but IIRC section 6.2.5
> contains info about sequences.
>
> I can check more closely if you send me the template you are using.
>
> /Rolf
>
> > Rolf,
> >
> > I want to know if the first bit of PMAP for sequence field indicate
> > the presence of length field or not. Is there related information in
> > the spec?
> >
> > Thanks Michael
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