# Siblings collection

> Feature introduced in Pipeline 6.2

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

```
theme.siblings
```

The content type is **Single line text** and **One value**. 

This metafield maps each product to the correct collection handle for the siblings. 

Start by defining a **Products** metafield and name it **Siblings collection**. Then change the Namespace from `custom` to `theme` and the key to simply `siblings`. 

{% hint style="info" %}
Important steps (**two** changes):

* Rename <mark style="color:red;">**`custom`**</mark> to <mark style="color:green;">**`theme`**</mark>
* Rename the key to <mark style="color:green;">**`siblings`**</mark>(Be sure to change from siblings\_collection to simply siblings)
  {% endhint %}

<figure><img src="/files/kPdfH69Oefd9mjTXsN6M" alt=""><figcaption><p><strong>Two Changes required in the Namespace and key</strong></p></figcaption></figure>

Next, add a description. You can name this one *Collection handle for siblings*.&#x20;

Then click on **Select content type** and choose **Single line text** as the type and **One value**:

<figure><img src="/files/TvK2cOpdkdtVYzN6ZGIo" alt=""><figcaption></figcaption></figure>

**Save** the definition.&#x20;

### Important - Check the saved metafield

Your second metafield should look like this:

<figure><img src="/files/gH6xq7iNzK2X500xrEBS" alt=""><figcaption></figcaption></figure>

{% hint style="success" %}
Please ensure you change the Namespace and key to this custom version for Pipeline:\
\
\&#xNAN;**`theme.siblings`**\
\
By default, the namespace begins with<mark style="color:red;">**`custom`**</mark>. This will need to be changed to<mark style="color:green;">**`theme`**</mark> and also **trim** the **key** to just<mark style="color:green;">**`siblings`**</mark>.&#x20;

&#x20;
{% endhint %}

The content type is **Single line text** and **One value**.

### Product setup

Next, we will use these newly defined metafields in the Product Setup for each product:

{% content-ref url="/pages/RYOOT6eWhk5j5YW6e5HT" %}
[Siblings product setup](/siblings/product-siblings/siblings-product-setup.md)
{% endcontent-ref %}


---

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```
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```

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