mapping historical data with selection id to runner

[florian19952008]

Hi all, thanks for helping me with this problem. I downloaded the historical data for horse racing from the betfair historical data website but I have a problem mapping the results of the historical data to a runner and a horse ID. The only thing specific to participant I can find is the selection id (which is not unique and the name which says nothing about the horse it is on. Does anyone know how to resolve the problem? Because as I understand it the selection id does not stay the same over its lifetime.

[pwebtech]

Not sure but, from experience only, I'd say selectionId stays the same? And there's nothing in the API documentation to say otherwise?

[florian19952008]

Hi thanks for the fast reply. So to put it in a statement: The selection id is a unique combination of the jockey and horse?The selection ID is defined by the horse with runnerID and the jockey by Jockey name, correct?

[pwebtech]

No sorry I was only referring to the horse(runner)'s 'selectionId' in 'MarketBook' that uniquely ID's the horse/selection and seems to stay the same across races. But this does not include a reference to the jockey!

So actually all I was saying is that: what you see in the historical data under 'runner.id' is the same ID used in the APIs e.g. MarketBook.runners[selectionId] and that it appears to uniquely IDs that horse across races.

Sorry for confusion!