> For the complete documentation index, see [llms.txt](https://story.groupthought.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://story.groupthought.com/siblings/product-siblings/siblings-collection.md).

# Siblings collection

> Feature introduced in Story 3.2.0

The second required metafield is **`theme.siblings`** 

```
theme.siblings
```

The content type is: Text, Single line text. 

This metafield maps each product to the correct collection handle for the siblings. The metafield is used to indicate which custom collection the product belongs to.

Here's an example of a Collection we've created for in the Shopify Admin -> Collections. The collection name will later be used when mapping with the `theme.siblings` metafield:

![](/files/mdpIwVTZ4vurcSonjqug)

Back to creating the next metafield under Settings -> Metafields. Start by defining a **Products** metafield and name it **Siblings collection**. Then change the Namespace from `my_fields` to `theme` and the key to simply `siblings`.

{% hint style="info" %}
Important step: Rename **`my_fields`** to **`theme`**

And the key to **`siblings`**
{% endhint %}

![](/files/GhDosA7fkXppH34JKtvm)

Next, add a description. You can name this one *Collection handle for siblings*. Then click on **Select content type** and choose **Text**, **Single line** as the type:

![](/files/TkhdI3OYyiVExXQTQnSg)

**Save** the definition. 

### Check the saved metafield

Your second metafield should look like this:

![](/files/ISOXHLm1kvEXH58AJVHK)

{% hint style="success" %}
Please ensure you change the Namespace and key to this custom version for Story:\
\
\&#xNAN;**`theme.siblings`**\
\
By default, the namespace begins with **`my_fields`**. This will need to be changed to **`theme`** and also trim the key to just **`siblings`**. 
{% endhint %}

The content type is **Text** and the style is **Single line text**. 

### Next step

We will use these newly defined metafields in the Product Setup for each product:

{% content-ref url="/pages/VQ3wgwzSYExo9imVDM5V" %}
[Siblings product setup](/siblings/product-siblings/siblings-product-setup.md)
{% endcontent-ref %}