The statement of what the platform is: the common capabilities every derivative inherits, the range of variation it supports, the products it is meant to serve and what it deliberately leaves out.
Specification Work product in the Platform and derivative products lifecycle
Every team that builds on the platform needs one agreed answer to what it provides and what it does not. The definition sets that boundary, so derivatives can plan on it and the platform team can refuse scope that would weaken the common base.
The full lifecycle detail, with its charts, flows, tables and every section, is for registered members. Registration is free and takes a minute. You come back to this page afterwards.