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

# Properties

The `properties` method is where you define the output of the items that goes into index you can query from the [Query API](/api-reference/query)

```js title="Properties example" theme={null}
properties: function (sourceEntity) {
  return {
      sku: sourceEntity.properties.sku, 
      title: sourceEntity.properties.title, 
      description: sourceEntity.properties.description,
      isActive: sourceEntity.properties.isActive
  };
}
```

The properties method must return an object with the values for the fields you defined in the [index](/enterspeed/reference/js/index-schema/index-method) object.