Hi @shwetha.krishnaiah02 ,

Please refer to this previous discussion thread for the discussion of this topic.

Hope that this information is of help

Thanks Zoya for feedback,

I see the below last line on the reference provided- Could you please advise that the key would never change that is assigned against the instrument.

"The part of your question of whether the keys are guaranteed to stay the same for the same instrument, or ever update, we am going to research further and get back to you on."

Please also feedback if there is a business defnition to each of the response that we get- I could find anything against what validity means in the documentation under dev portal

"@odata.context": "https://selectapi.datascope.refinitiv.com/RestApi/v1/$metadata#Collection(DataScope.Select.Api.Search.HistoricalSearchResult)",
    "value": [
        {
            "Identifier": "0#BL2:",
            "IdentifierType": "ChainRIC",
            "Source": "",
            "Key": "VjF8MHgzMDAwMDAwMDAwMDAwMDAwfDB4MzAwMDAwMDAwMDAwMDAwMHx8fHx8fHwwI0JMMjp8",
            "Description": "Historical Chain",
            "InstrumentType": "Unknown",
            "Status": "Valid",
            "DomainCode": "6",
            "FirstDate": "1998-02-03T00:00:00.000Z",
            "LastDate": "2021-11-14T00:00:00.000Z",
            "History": []
        }

Regards,

Hello @shwetha.krishnaiah02 ,

In REST API Reference Tree specification for HistoricalSearch request, Results, please find:

Key is "Unique identifier for the instrument".

As part of the research conducted, to provide the answers, to the question from the referenced thread, we have escalated the inquiry to Datascope product team, and have received the confirmation verbatim: "the key information is retrieved from the source as part of Tick History HistoricalSearch which is assigned to an instrument and this will not get changed." Therefore, I confirm, per product guidance, that key as assigned will not change.

For the complete interface, including the meaning of the Enum values in ValidityStatus field within response, please refer to REST API Reference Tree=> HistoricalSearch=> Enums:

Hope that this information is of help