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What is meant by Reuter field BOOK_STATE is Compatible

Hello,

We are suing RFA 8.1 C++ api and MarketPrice(MP) domain to get Level1 data. Reuters data model suggest that Field BOOK_STATE(FID - 6516) is "compatible" and show it to be "Optional". What does it mean? It will be available on certain markets only? if so, can I know which markets publish this field?


Also as shown in Red circle, clicking mouse over "<<" suggests that "field is backward compatible". What does that mean?


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@mktdata

Thanks for reaching out to us.

I checked the Data Model Discovery – User Guide and couldn't find the explanation of those options.

Please contact the Data Model Discovery support team directly via MyRefinitiv to get answers.

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Hello, As shows in attached screen shot, I can see those fields in data model discovery of MP domain. You have to turn on "Show compatible" as shown in screen shot

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