Restricting value search to specific attributes

Value search queries could potentially contain many results. You can use RestrictToProperties attribute to limit the number of returned results to a list of one or more specified attributes.

If a managed attribute is searched, using RestrictToProperties you can search within a whole managed attribute and its entire hierarchy of values, but you cannot restrict value search to a subtree within a particular root value in the hierarchy.

To restrict value search to searching specific attributes, use RestrictToProperties element inside ContentElementConfig, as shown in this abbreviated example:
<ns:ContentElementConfig
...
<ns:RestrictToProperties>
<ns:Property>ProductCategory</ns:Property>
<ns:Property>Bike Racks</ns:Property>
</ns:RestrictToProperties>
</ns:ContentElementConfig>