> For the complete documentation index, see [llms.txt](https://help.stockeo.solvenium.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.stockeo.solvenium.com/data-mapping/sku.md).

# SKU

To recognize products in your store and take appropriate properties for them from the supplier feed, Stockeo needs a unique key for each item. The SKU is most commonly used for this.

#### Basic SKU settings

When your supplier provides the SKU in the feed, you can use this value directly. In the following example, the SKU is in the *Code* node.

{% tabs %}
{% tab title="Stockeo SKU settings" %}

<figure><img src="/files/IEmSGAZp614fUhQJedNA" alt="SKU settings in Stockeo for Shopify"><figcaption><p>SKU settings in Stockeo</p></figcaption></figure>
{% endtab %}

{% tab title="Supplier feed" %}

```xml
<Product>
<Code>192330</Code>
<Title>
Pack Of 3 Energy Saving Candle Bulbs 7W (35W Equiv)
</Title>
<Price>2.25</Price>
<RRP>2.95</RRP>
<AvailableStock>29</AvailableStock>
<Barcode>5050140001004</Barcode>
<Categories>Lighting > Bulbs and Accessories</Categories>
<Colour>WHITE</Colour>
<Material>GLASS</Material>
<Description>
Pack of 3 energy saving candle bulbs wth a power of 7 watts, saving energy. These are 40 watt equivalent bulbs
</Description>
</Product>
```

{% endtab %}
{% endtabs %}

#### Add a prefix to the SKU

Use this option if you would like to add a prefix to your SKU easily in the Create mode or in the Update mode when SKUs in your store contain a prefix which does not appear in the feed SKUs.

<figure><img src="/files/SSXbSP97YXzwsgq4rwgg" alt="Add a prefix to products SKU in Stockeo annotated"><figcaption><p>Add a prefix to products SKU in Stockeo</p></figcaption></figure>

#### Generate SKU with the Liquid formula

It may also happen that no field in the feed can be used as the SKU. In this case, use a combination of several fields to create a unique id for each product. To do this enter the Liquid formula directly in the SKU field:

{% tabs %}
{% tab title="Stockeo SKU settings" %}

<figure><img src="/files/CY2tdhlkMBxq1enk8UIM" alt=""><figcaption><p>Sku settings with a Liquid formula in Stockeo</p></figcaption></figure>
{% endtab %}

{% tab title="Supplier feed" %}

<pre class="language-xml"><code class="lang-xml"><strong>&#x3C;item>
</strong>    &#x3C;id>187&#x3C;/id>
    &#x3C;model>PF112&#x3C;/model>
    &#x3C;name>Ernesto leather wallet&#x3C;/name>
    &#x3C;option>Colour Dark Blue&#x3C;/option>
    &#x3C;quantity>34&#x3C;/quantity>
&#x3C;/item>
&#x3C;item>
    &#x3C;id>187&#x3C;/id>
    &#x3C;model>PF112&#x3C;/model>
    &#x3C;name>Ernesto leather wallet&#x3C;/name>
    &#x3C;option>Colour Brown&#x3C;/option>
    &#x3C;quantity>34&#x3C;/quantity>
&#x3C;/item>
</code></pre>

{% endtab %}

{% tab title="Copy SKU settings" %}

```liquid
{{ model }}-{{ option | replace: "Colour ", "" | replace: " ", "-" | upcase }}
```

{% endtab %}
{% endtabs %}

The Liquid formula above for items in this example feed gives the following results:

<figure><img src="/files/4Ml31ySILjbBlM16rvsX" alt="Example SKUs generated with SKU Liquid fomula in the Shopify store"><figcaption><p>Example SKUs generated with SKU Liquid formula</p></figcaption></figure>

#### Alternative variant identifiers

You can also use [metafields](/data-mapping/metafields.md) or [barcodes](/data-mapping/barcode.md) to identify variants in Shopify when SKUs are missing from the feed or do not match the SKUs in Shopify. All supported alternative variant identifiers are explained in the following video:

{% embed url="<https://youtu.be/Y-JyC0SsaZQ?si=Bl4EglOt75On_zAx>" %}
Update variants in Shopify by SKU, barcode or metafield
{% endembed %}
