"book-pflow-xyz/chapters/appendix-d-glossary.md" . . "The discipline of a schema that only grows: new facts can be added, existing facts are never retracted, so learning more never invalidates what was already known (Chapter 16). The history places of Chapters 6 and 7 follow the same discipline at the level of a single net. See *Write-once place*."@en . . "Monotonic expansion"@en . "16"^^ . "6"^^ .