api-docs/docs/node-tracker/markdown/node-tracker.structuredevent.md
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[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [StructuredEvent](./node-tracker.structuredevent.md)
## StructuredEvent interface
A Structured Event A classic style of event tracking, allows for easier movement between analytics systems. A loosely typed event, creating a Self Describing event is preferred, but useful for interoperability.
<b>Signature:</b>
```typescript
interface StructuredEvent
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [action](./node-tracker.structuredevent.action.md) | string | |
| [category](./node-tracker.structuredevent.category.md) | string | |
| [label?](./node-tracker.structuredevent.label.md) | string | <i>(Optional)</i> |
| [property?](./node-tracker.structuredevent.property.md) | string | <i>(Optional)</i> |
| [value?](./node-tracker.structuredevent.value.md) | number | <i>(Optional)</i> |