}
for (int i = 0; i < edgeLabels; i++) {
String labelName = getEdgeLabelName(i);
String pkName = getSortKeyForLabel(labelName);
TitanKey pk = tx.getPropertyKey(pkName);
tx.makeLabel(getEdgeLabelName(i)).sortKey(pk).make();
}
tx.makeKey(UID_PROP).dataType(Long.class).indexed(Vertex.class).single().unique().make();
tx.commit();
}