Triplex

A temporal fact database for TypeScript.

Store facts. Query relationships. Derive state. Keep the complete history.
Bitemporal facts, Datalog, and typed, content-addressed configuration—built on Effect.

Get started →GitHub ↗

01 · Factsstudent → submitted → quiz

02 · Datalogsubmission without a grade

03 · Current stategrading task · open

query.tsfacts.tsontology.ts

import { Effect
 } from "effect";
import { Triples
 } from "@bjacobso/triplex";

export const openGradingTasks
 = Effect
.gen
(function* () {
  const triples
 = yield* Triples
;

  return yield* triples
.query
({
    find
: ["?student", "?quiz"],
    where
: [
      ["?submission", ":submission/student", "?student"],
      ["?submission", ":submission/quiz", "?quiz"],
      ["not", ["?submission", ":submission/grade", "?grade"]],
    ],
  });
});

import { Effect
 } from "effect";
import { EntityId
, KvTriples
, Triples
, ref
 } from "@bjacobso/triplex";

const student
 = EntityId
.make
("student:ada");
const quiz
 = EntityId
.make
("quiz:logic-1");
const submission
 = EntityId
.make
("submission:ada:logic-1");

export const submitQuiz
 = Effect
.gen
(function* () {
  const triples
 = yield* Triples
;

  return yield* triples
.transact
(
    [
      {
        op
: "assert",
        entityId
: submission
,
        entityType
: "Submission",
        attribute
: ":submission/student",
        value
: ref
(student
),
      },
      {
        op
: "assert",
        entityId
: submission
,
        entityType
: "Submission",
        attribute
: ":submission/quiz",
        value
: ref
(quiz
),
      },
    ],
    {
      actor
: "teacher:grace",
      commandId
: "submit:ada:logic-1",
      configSnapshot
: "config:learning-2026.1",
    },
  );
}).pipe
(Effect
.provide
(KvTriples
.layer
));

import { Effect
 } from "effect";
import { Attribute
, ConfigStore
, EntityType
 } from "@bjacobso/triplex/config";

const StudentName
 = Attribute
.text
(":student/name");

const Student
 = EntityType
.make
("Student", {
  attributes
: {
    name
: Attribute
.use
(StudentName
, {
      required
: true,
      unique
: true,
    }),
  },
});

export const publishSchema
 = Effect
.gen
(function* () {
  const config
 = yield* ConfigStore
.ConfigStore
;

  return yield* config
.commit
({
    label
: "learning-2026.1",
    objects
: yield* Student
.nodes
,
    ref
: "live",
  });
});