steve@0: PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
steve@0: PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
steve@0: PREFIX owl: <http://www.w3.org/2002/07/owl#>
steve@0: PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
steve@0: PREFIX abc: <http://example.org/abc#>
steve@0: PREFIX seq: <http://example.org/seq#>
steve@0: PREFIX sia: <http://example.org/sia#>
steve@0: 
steve@0: CONSTRUCT { _:vte rdf:type sia:VectorTableElement;
steve@0: 			sia:fromDatapoint ?datapoint1;
steve@0: 			sia:toDatapoint ?datapoint2}
steve@0: WHERE
steve@0: {
steve@0:  	?datapoint1 sia:memberOfOrderedSet ?bnode .
steve@0:  	?datapoint2 sia:memberOfOrderedSet ?bnode .
steve@0: 	?bnode a sia:OrderedSet .
steve@0: 	?datapoint1 sia:orderedIndex ?i1 .
steve@0: 	?datapoint2 sia:orderedIndex ?i2
steve@0: 	FILTER ((?datapoint1 != ?datapoint2) && (?i1 < ?i2))
steve@0: }
steve@0: GROUP BY ?datapoint1 ?datapoint2