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I am working with Sitecore Analytics version 9 update 2.
There are two contact reference name
Can anyone please elaborate what is the difference between both where which contact type we will use? Thanks.
These are two different models used for different purposes. To quote Sitecore documentation:
The tracker uses its own model (Sitecore.Analytics.Tracking.Contact) to represent contacts, interactions, and events. It does not use the xConnect model. On session end, data collected by the tracker is converted to a format that can be used by xConnect (Sitecore.XConnect.Contact). For example, Sitecore.Analytics.Model.Entities.IContact is converted to Sitecore.XConnect.Contact.
Sitecore.Analytics.Tracking.Contact for contact tracking purposes.Sitecore.XConnect.Contact to save/load contact data to xConnect.
Sitecore.Analytics.Tracking.Contact to Sitecore.XConnect.Contact.
May 10 '19 at 9:58