Hello @Graham J
Which RKD API service that you are using?
Additionally, you can find all RKD API resources such as the API document, interactive playground from the RKD API Product page (https://support-portal.rkd.refinitiv.com/SupportSite/TestApi/Catalog).
Hello @Graham J
I am contacting the RKD API team to check this data/content question.
In the meantime, you can check the RKD API supported fields from the "Coverage" and "Field Lookup" button on the RKD API https://support-portal.rkd.refinitiv.com/SupportSite/TestApi/Op?svc=Quotes_1&op=RetrieveItem_3 page.
Additionally, you can contact the RKD API support team directly via the https://my.refinitiv.com/content/mytr/en/helpandsupport.html page.