Additional niches properties of products allow studying user preferences and calculating recommendations more accurately. This section describes allowing filling the product feed with niche features of pet products.

Pets

The "pets" element must be inside the "offer" element.

<offer ...>
    ...
    <pets>
        ...
    </pets>
</offer>

Type

The "pet_type" element must be inside the "pets" element and can have one of the following values:

<offer ...>
    ...
	<pets>
	    <pet_type>cat</pet_type>
	</pets>
</offer>

Breed

The "breed" element must be inside the "pets" element.

<offer ...>
    ...	
	<pets>
        <!-- ANA - the Anatolian cat (Turkish Shorthair) -->
	    <breed>ANA</breed>
	</pets>
</offer>

Size

The "pet_size" element must be inside the "pets" element and can have one of the following values:

<offer ...>
    ...
	<pets>
	    <pet_size>small</pet_size>
	</pets>
</offer>

Age

The "pet_age" element must be inside the "pets" element and can have one of the following values:

<offer ...>
    ...
	<pets>
	    <pet_age>old</pet_age>
	</pets>
</offer>

Periodic

The "periodic" element must be inside the "pets" element and can have one of the following values:

<offer ...>
    ...
	<pets>
	    <periodic>1</periodic>
	</pets>
</offer>