+**Df2** represents a refined state or advanced [Function](/wiki/Function) within a larger framework. It often signifies an evolution from [Df1](/wiki/Df1), embodying enhanced principles for stability or performance. This iteration typically builds upon prior foundations.
+## See also
+- [Df1](/wiki/Df1)
+- [System](/wiki/System)
+- [Design](/wiki/Design)
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