#6 Some category Labels end in plural S, some don't

[Ola Spjuth]

Example:

<Category rdf:ID="electronicDescriptor">
<rdfs:label>Electronic Descriptors</rdfs:label>
...
</Category>

<Category rdf:ID="constitutionalDescriptor">
<rdfs:label>Constitutional Descriptor</rdfs:label>
...
</Category>