# Siblings collection

> Feature introduced in Broadcast 3.5

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

```
theme.siblings
```

For the content type, select 'Single line text' and choose the 'One value' option.

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

Start by defining a new Product metafield. You can name it 'Siblings' so that you can more easily find it later.

{% hint style="info" %}
Important steps:

* Change the namespace from '**custom'** to '**theme**'.
* Set the key to '**siblings**'.
  {% endhint %}

Adding a description is optional, but be sure to select the correct content type. Choose 'Single line text**'** and set it to 'One value**'**:

<figure><img src="/files/I90enF9cMGHzztK6jO4h" alt="Demonstration of the metafield setup for siblings"><figcaption></figcaption></figure>

<figure><img src="/files/Yb5oOjq5FtbTh79Y000s" alt="Demonstration of the metafield setup for siblings"><figcaption></figcaption></figure>

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

### Check the saved metafield

Your second metafield should look like this:

<figure><img src="/files/UKO54B4BfTnVeRJnZp8q" alt="Demonstration of the metafield setup for siblings"><figcaption></figcaption></figure>

{% hint style="info" %}
Please ensure you change the Namespace and key to this custom version for Broadcast:\
\
\&#xNAN;**`theme.siblings`**

\
By default, the namespace begins with '**custom'**. This namespace will not be recognized by Broadcast. You have to change it to '**theme**'.

This is a good distinction to make, and it helps keep your store, custom, theme, and app metafields separate.
{% endhint %}

### Product setup

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

{% embed url="<https://broadcast.presidiocreative.com/siblings/product-siblings/siblings-product-setup>" %}


---

# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://broadcast.presidiocreative.com/siblings/product-siblings/siblings-collection.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.