Platform Initialization Specification 1.7, Released January 2019.
As of version 1.3, the PI specification contains five volumes:
UEFI Forum (2007-03-27). "UEFI Forum Promotes Industry Adoption of Extensible Firmware with New Specifications, Interoperability Events and the Formation of Its Industry Communications Working Group". Retrieved 2011-08-11. http://home.businesswire.com/portal/site/google/index.jsp?ndmViewId=news_view&newsId=20070327005409&newsLang=en ↩