# Frontmatter Fields

Tolaria uses conventions instead of a required schema.

| Field | Meaning |
| --- | --- |
| `type` | The note's entity type. |
| `status` | Lifecycle state. |
| `icon` | Per-note icon. |
| `url` | External URL. |
| `date` | Single date. |
| `belongs_to` | Parent relationship. |
| `related_to` | Lateral relationship. |
| `has` | Contained relationship. |
| `_width` | Per-note editor width override. |
| `_icon`, `_color` | Type or note appearance metadata. |
| `_sidebar_label`, `_order` | Type sidebar label and order. |
| `_pinned_properties` | Properties pinned for a type. |

## Custom Fields

You can add your own fields. If a field contains wikilinks, Tolaria can treat it as a relationship.

## System Fields

Fields starting with `_` are reserved for system behavior and hidden from standard property editing. They remain plain YAML, so they can still be inspected or changed in raw mode when needed.
