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 real estate.

Realty

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

<offer ...>
    ...
    <realty>
        ...
    </realty>
</offer>

Price

The "price" element must be inside the "offer" element and have the value of the area cost per 1m².

<offer ...>
    ...
    <price>10.52</price>
</offer>

Space

The "space" element must be inside the "realty" element and includes a minimum, maximum and final value of the object's area:

<offer ...>
    ...
	<realty>
	    <space>
			<!-- Here can be set minimum and maximum object group size or precise size of a particular object -->
			<min>30</min>
			<max>100</max>
			<final>37</final>
		</space>
	</realty>
</offer>

Floor 

The "floor" element must be inside the "realty" element and includes the current floor of the object and the maximum floors:

<offer ...>
    ...
	<realty>
	    <floor>
			<current>3</current>
			<total>12</total>
		</floor>
	</realty>
</offer>

Transaction Type 

The "action" element must be inside the "realty" element and can have one of the following values:

<offer ...>
    ...
	<realty>
	    ...
		<action>sale</action>
	</realty>
</offer>

Property Type

The "type" element must be inside the "realty" element and can have one of the following values:

<offer ...>
    ...
	<realty>
	    <type>flat</type>
	</realty>
</offer>