443f18ee_ndard_Metrics___Analytics_Talk__WAA_Definition
[Compliant] Yes [Term] Visit Referrer [GA Definition] Same as WAA Note: This data is called a Referral in Google Analytics and can ONLY be the external referrer. [WAA Definition] 
The visit referrer is the first referrer in a session, whether internal, external or null.
Google Analytics Compliance with WAA Standard Metrics - Analytics Talk
WAA Definition