---
id: capability.infotech.citation-engine
name: Citation Evidence Domain Engine
summary: Core domain model and engine services for the citation-evidence ecosystem — shared vocabulary,
  in-memory repositories, orchestration services, event bus, and citation card renderers.
owner: citation-engine
status: draft
domain: infotech
tags:
- citation
- evidence
- domain-model
maturity:
  discovery:
    current: D3
    target: D5
    confidence: medium
    rationale: README documents the domain vocabulary (Document, Selector, Annotation, EvidenceItem/Link/Set)
      and points to wiki/SharedContracts.md as the authoritative conformance copy shared with citation-evidence.
  availability:
    current: A1
    target: A3
    confidence: medium
    rationale: Published as `@citation-evidence/engine`, consumed today only as a local sibling-checkout
      package link; no registry publish yet.
external_evidence:
  completeness:
    level: C1
    confidence: low
    basis: scope_vs_intent_and_consumer_expectations
    satisfied_expectations:
    - shared vocabulary and branded IDs
    - in-memory repositories and orchestration services
    - citation card renderers
    broken_expectations: []
    out_of_scope_expectations: []
  reliability:
    level: R0
    confidence: low
    basis: consumer_quality_signals
    known_reliability_risks:
    - only consumed by sibling citation-evidence today; no independent external consumer
discovery:
  intent: Provide the shared domain model and engine services underlying the citation-evidence workspace,
    decoupled from any single UI shell.
  includes:
  - Document/Selector/Annotation/EvidenceItem/EvidenceLink/EvidenceSet types
  - in-memory repositories, event bus, orchestration services
  - citation card rendering
  excludes:
  - the evidence-workspace UI shell (owned by citation-evidence)
  assumptions: []
  use_cases: []
  research_memos: []
availability:
  current_level: A1
  target_level: A3
  current_artifacts:
  - '`@citation-evidence/engine` npm package (local link, not published)'
  target_artifacts: []
  consumption_modes:
  - library import (workspace link)
relations:
  depends_on: []
  supports: []
  related_to: []
evidence:
  documentation:
  - README.md
  - wiki/SharedContracts.md
  tests:
  - vitest.config.ts
  consumer_feedback: []
  bug_reports: []
  incidents: []
consumer_guidance:
  recommended_for:
  - citation-evidence and future citation-domain consumers within the same monorepo/workspace
  not_recommended_for:
  - consumers outside the citation-evidence workspace (package not published to a registry)
  known_limitations:
  - not yet published; only consumable via sibling-checkout workspace link
promotion_history: []
---

# Citation Evidence Domain Engine

## Overview

`citation-engine` is the extracted domain model and engine layer for the citation-evidence ecosystem, published (workspace-local) as `@citation-evidence/engine` and consumed by the citation-evidence umbrella app.

## Assessment notes

### Discovery

README documents the domain vocabulary (Document, Selector, Annotation, EvidenceItem/Link/Set) and points to wiki/SharedContracts.md as the authoritative conformance copy shared with citation-evidence.

### Availability

Published as `@citation-evidence/engine`, consumed today only as a local sibling-checkout package link; no registry publish yet.

### Completeness

First-pass honest assessment from the REUSE-WP-0017 coverage campaign
(reuse-surface). No external consumer feedback exists yet; levels reflect
scope-vs-intent documentation quality, not internal code quality.

### Reliability

No production consumer telemetry exists yet; reliability level is
intentionally conservative pending REUSE-WP-0019 reuse-telemetry evidence.

## Promotion checklist

- [x] ID follows `capability.<domain>.<name>` pattern
- [x] Maturity enums match `specs/CapabilityMaturityStandard.md`
- [x] `external_evidence` is populated separately from `maturity`
- [ ] Relations reference valid capability IDs (none yet)
- [x] Index entry added in `registry/indexes/capabilities.yaml`