> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Citations

> Citation provenance

Every retrieved chunk carries a `Citation`:

```python theme={"system"}
@dataclass
class Citation:
    citation_id: str
    source_type: str           # "guideline" | "ontology" | "knowledge_base" | "payer_rule"
    source_name: str
    source_url: Optional[str]
    evidence_level: str
    relevance_score: float
    retrieved_at: datetime
    content_snippet: str       # max 200 chars
```

`CitedResponse` wraps the answer + citations + confidence + audit trail.