In the Term "SearchRestrictions" we defined in the complex type "SearchRestrictionsType" a property "UnsupportedExpressions" with the description "Expressions supported in $search". The description is wrong, it should read "Expressions not supported in $search".

<Term Name="SearchRestrictions" Type="Capabilities.SearchRestrictionsType" AppliesTo="EntitySet">
<Annotation Term="Core.Description" String="Restrictions on $search expressions" />
</Term>
<ComplexType Name="SearchRestrictionsType">
<Property Name="Searchable" Type="Edm.Boolean" DefaultValue="true">
<Annotation Term="Core.Description" String="$search is supported" />
</Property>
<Property Name="UnsupportedExpressions" Type="Capabilities.SearchExpressions" DefaultValue="none">
<Annotation Term="Core.Description" String="Expressions supported in $search" />
</Property>
</ComplexType>
<EnumType Name="SearchExpressions" IsFlags="true">
<Member Name="none" Value="0" />
<Member Name="AND" Value="1" />
<Member Name="OR" Value="2" />
<Member Name="NOT" Value="4" />
<Member Name="phrase" Value="8" />
<Member Name="group" Value="16" />
</EnumType>