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<article class="doc" id="doc-reference-glossary" aria-hidden="true"><div class="strip"><span class="path">reference/glossary.md</span><span class="tag">Engineering, reference</span><span class="meta">~1 min read</span></div>
<h1>22. Glossary</h1>
<div class="tbl-wrap"><table class="col-table compact"><colgroup><col class="col-auto"/><col class="col-lg"/></colgroup>
<thead>
<tr>
<th>Term</th>
<th>Meaning</th>
</tr>
</thead>
<tbody>
<tr>
<td data-label="Term">AVS</td>
<td data-label="Meaning">After-Visit Summary, patient-facing discharge/visit document</td>
</tr>
<tr>
<td data-label="Term">ADT A03 / A01 / A04</td>
<td data-label="Meaning">HL7v2 events: discharge / admit / registration, trigger + readmission signals</td>
</tr>
<tr>
<td data-label="Term">Backend services (SMART)</td>
<td data-label="Meaning">OAuth2 client-credentials app-to-app FHIR access, no user login</td>
</tr>
<tr>
<td data-label="Term">CCD (CDA R2)</td>
<td data-label="Meaning">Continuity of Care Document, the only EHR export artifact (ADR-010)</td>
</tr>
<tr>
<td data-label="Term">Episode</td>
<td data-label="Meaning">One patient's 30-day post-discharge instance and its state container</td>
</tr>
<tr>
<td data-label="Term">Evidence class</td>
<td data-label="Meaning">Provenance of a status event: patient_report | pharmacy_confirmed | clinician_confirmed | ehr</td>
</tr>
<tr>
<td data-label="Term">Gate (1–7)</td>
<td data-label="Meaning">Deterministic validation stage every extracted fact must pass before publication</td>
</tr>
<tr>
<td data-label="Term">Grant</td>
<td data-label="Meaning">Time-boxed, purpose-limited access token record (clinician or caregiver)</td>
</tr>
<tr>
<td data-label="Term">L1/L2/L3</td>
<td data-label="Meaning">Exception routes: operational / clinical-judgment / safety (§12.5)</td>
</tr>
<tr>
<td data-label="Term">Material change</td>
<td data-label="Meaning">Fact classes that force brief regeneration and require level ≤7 sourcing</td>
</tr>
<tr>
<td data-label="Term">Outbox</td>
<td data-label="Meaning">Same-transaction event table drained ≤5 s; mechanism for all 60 s SLAs</td>
</tr>
<tr>
<td data-label="Term">Policy envelope</td>
<td data-label="Meaning">Versioned JSON contract bounding an agent's tools, retries, costs, prohibitions</td>
</tr>
<tr>
<td data-label="Term">Source level</td>
<td data-label="Meaning">Position 1–9 in the precedence hierarchy (ADR-009)</td>
</tr>
<tr>
<td data-label="Term">Step-up</td>
<td data-label="Meaning">Fresh OTP ≤5 min before any clinician confirmation writes</td>
</tr>
<tr>
<td data-label="Term">Superseded</td>
<td data-label="Meaning">Terminal task/fact state preserving history when replaced</td>
</tr>
<tr>
<td data-label="Term">Universal Task</td>
<td data-label="Meaning">The single 11-state workflow object underlying every patient/clinician action</td>
</tr>
</tbody>
</table></div>
<blockquote>
<p><strong>Approval &amp; Next Step.</strong> Founder sign-off baselines this specification as TAI-ARCH-SPEC-001. Sprint 1 begins against Section 19 immediately; the Phase-0 partner review (Section 21) runs in parallel and cannot block the critical path by design.</p>
</blockquote>
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