SecurityIDSource or SecurityAltIDSource value of '8' for Exchange Symbol for CME

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Imported from previous forum

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Hello,

In the FIX/FAST MessageSpecs (http://www.cmegroup.com/globex/files/SDKFFMessageSpecs.pdf) and messages the SecurityIDSource has a default value of ‘8’, which corresponds to the Exchange Symbol ID Source.

However, in the FIXML specification for futures(http://www.cmegroup.com/clearing/files/SecurityDefinitionFIXMLFutures.pdf) it does not list this as a valid SecurityIDSource or SecurityAltIDSource. It only has the following:

O=Floor
H = Clearing House / Clearing Organization
TCC=100
ITC=101
IXM=102
Globex=103

Can someone shed any light on this? I need to get the corresponding message out of FIXML that is FIX.

Thanks in Advance,
McKelly