@Test(groups={"rdf-schema-test"})
public void testRowNumberCell(){
Node rowNumberNode = getLink(root,"http://reference.data.gov.uk/def/central-government/heldBy");
assertNotNull(rowNumberNode);
assertTrue(rowNumberNode instanceof CellResourceNode );
CellResourceNode rowNumber = (CellResourceNode) rowNumberNode;
//test URI expression
assertEquals(rowNumber.getUriExpression(),"('#person' + value).urlify()");
//test column name
assertNull(rowNumber.getColumnName());
testLinks(rowNumber, "http://xmlns.com/foaf/0.1/name","http://xmlns.com/foaf/0.1/mbox");
testRdfTypes(rowNumber, "http://xmlns.com/foaf/0.1/Person");
}