Hi,

There's a few ways to make use of extension data in products and product variants. In the simplest form, you can use it just to hold extra attributes about a product specific to your business. The other way is to use it in your XSL transform. Currently, in the 1.2 version, the extension data is published for sales promotion rules.

Suppose your business sells a seasonal product and you had the following extension data:

<data>
<seasonal>true</seasonal>
</data>

Then on runtime, the extension data shows up in the XML for your promotion transform rule. Your promotion rule can in turn make use of this information to offer the discount only for seasonal products.

<in>
<product>
<name>Product1</name>
<categories>
<categoryID>2</categoryID>
<categoryPath>2</categoryPath>
</categories>
<productVariant>
<productID>1</productID>
<productVariantID>8</productVariantID>
<promotionPrice />
<name>Default</name>
<msrp />
<productCost />
<sku></sku>
<manufacturerID />
<distributorID />
<price>10.0000</price>
<requireShipping>true</requireShipping>
<recurringIntervalType>1</recurringIntervalType>
<recurringInterval>2</recurringInterval>
<extension>
<data>
<seasonal>true</seasonal>
</data>
</extension>
</productVariant>
</product>
</in>

Good info and example. If your prioritizing your future enhancements, it would be usefull for things like calculate shipping and handling (my 2 cents). Thanks as always.