An assortment of links I’ve found cool: https://www.wenger-trayner.com/introduction-to-communities-of-practice/ https://archive.org/details/logicdatabases0000symp/page/n5/mode/2up https://medium.com/@shiiyan/active-record-pattern-vs-repository-pattern-making-the-right-choice-f36d8deece94 https://github.com/eejai42/conceptual-model-completeness-conjecture-toe-meta-model https://www.recoll.org/