Sidemantic supports templating in a **narrow** place: parameter interpolation in **filter strings** for programmatic queries.

<Callout type="warning">
The SQL interface does **not** interpolate `{{ ... }}`.
</Callout>

## What Exists Today

- **Filter templating** in programmatic `query` / `compile` flows.
- You register parameters on the graph (Python) and pass `parameters` values.

Example:

```python doc-validate=lint
sql = layer.compile(
    metrics=["orders.revenue"],
    dimensions=["orders.status"],
    filters=["orders.order_date >= {{ start_date }}"],
    parameters={"start_date": "2024-01-01"},
)
```

## What’s Deprecated

- “Template parameters” are deprecated as a general feature and are intentionally constrained.

## Why README Mentions Jinja2

Sidemantic uses Jinja2 as the templating engine for the supported interpolation path (filters). It is not a guarantee that every interface or SQL string supports templating.

## Migration Guidance

- If you’re using `{{ ... }}` in semantic SQL: move that logic into programmatic query filters or into your warehouse views/models.