categorical_structure

2 rows where category = "Ring"

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Link category construction
Ring,initial object Ring initial object
Ring,terminal object Ring terminal object

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CREATE TABLE "categorical_structure" (
	"category"	TEXT NOT NULL,
	"construction"	TEXT NOT NULL,
	FOREIGN KEY("construction") REFERENCES "universal_objects"("construction") on update cascade on delete restrict,
	FOREIGN KEY("category") REFERENCES "categories"("name") on update cascade on delete restrict,
	PRIMARY KEY("category","construction")
);