public String toRDF() {
Serializer sb = new Serializer();
sb.open("kg:Index");
sb.appendPNL("kg:index ", index);
int total = 0;
for (Node pred : getSortedProperties()) {
int i = get(pred).size();
if (i > 0) {
total += i;
sb.append("kg:item [ ");
sb.appendP("rdf:predicate ", pred);
sb.append("rdf:value ", i);
sb.appendNL("] ;");
}
}
sb.appendNL("kg:total ", total);
sb.close();
return sb.toString();
}
