What is the source of office "electrical equipment definition" in the Openstudio?

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Hi, I was interested in a source of Electrical equipment definition in Openstudio. For example, there is "90.1-2010 - Office - ClosedOffice Electric Equipment Definition (the value is 6.888903W/sqm)" in the data in the resource folder of the open studio. But there is no data of electric equipment internal load in ASHRAE Standard 90.1-2010. And the value is different from COMnet appendix B. What is the source of this data? Thank you so much in advance!