= data date

olemus
Longman Business Dictionary:
as of -- American English preposition
1 on a particular date SYNas at BrE
As of August 1, the company had $44 million in long-term debt.
2 from a particular date
As of July, the company will be based in New York

näiteid
ISO/IEC/IEEE 24765:
a point in time when the status of the project is recorded