Present method
<label:Ruleset rdf:ID="Ruleset">
<label:hostRestriction>example.org</label:hostRestriction>
<label:hostRestriction>example.com</label:hostRestriction>
<label:hasDefaultLabel rdf:resource="#label_1"/>
<label:rules rdf:parseType="Collection">
<rdf:Description rdf:ID="rule1">
<label:hasURI>chat</label:hasURI>
<label:hasLabel rdf:resource="#label_2" />
</rdf:Description>
<label:unionOf rdf:ID="rule2">
<label:hasURI>ads</label:hasURI>
<label:hasURI>banners</label:hasURI>
<label:hasLabel rdf:resource="#label_3" />
</label:unionOf>
</label:rules>
</label:Ruleset>