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greenfield architecture
/ˈɡriːn.fiːld ˈɑːr.kɪ.tɛk.tʃər/ - n.
1 [colloq.] A clean design, defined by the absence of anyone using it yet.Keep. Punchy.This is the problem.
Working definition
2. A design built from scratch with no constraints from existing systems, free to adopt preferred patterns and technologies.