Search Hypernym Import/Export

The search2.xsd supports merchant-provided hypernyms. If the hypernym of a hypernym group is empty, a warning appears and the hypernym group is skipped. For example:

<hypernym-list xml:lang="x-default">
    <hypernym-rule>
        <hypernyms></hypernyms>
        <hyponyms> 1 </hyponyms>
    </hypernym-rule>
</hypernym-list>

In this example the hypernym group is skipped and the following error appears:

WARN [WARNING] [DATAERROR] Line: 201/Hypernym Group:Empty hypernym. Skipping hypernym group.