Perform X3D Ontology query X3dHelloWorldQuery_01.rq using examples/HelloWorld.ttl to produce output file X3dHelloWorldQuery_01.rq.txt:
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PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl:  <http://www.w3.org/2002/07/owl#>
PREFIX xsd:  <http://www.w3.org/2001/XMLSchema#>
PREFIX x3d:  <https://www.web3d.org/specifications/x3d-4.0.xsd#>
PREFIX x3do: <https://www.web3d.org/specifications/X3dOntology4.0#>

# X3dHelloWorldQuery_01.rq    Query HelloWorld.ttl to count number of Shape nodes, with expected result = 2 nodes.

# TODO how to count total and create a unit test for this model?
# BIND (count(distinct ?shape) as ?shapeCount)
# GROUP BY ?ShapeNodesFound

###############################################

SELECT ?ShapeNodesFound ?parentNode ?grandParentNode

WHERE
{ 
    ?shape  a x3do:Shape ; # Shorthand expression: a = rdf:type
            x3do:hasParent ?parent .
    ?parent x3do:hasParent ?grandParent .

    # https://stackoverflow.com/questions/11234371/sparql-query-results-without-namespace
    BIND (strafter(xsd:string(?shape),"#")       AS ?ShapeNodesFound)
    BIND (strafter(xsd:string(?parent),"#")      AS ?parentNode)
    BIND (strafter(xsd:string(?grandParent),"#") AS ?grandParentNode)
}
ORDER BY (?ShapeNodesFound) # alphabetic order results in scene-graph order given by each name

###############################################
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| ShapeNodesFound | parentNode             | grandParentNode |
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| "Shape_2_3_2_1" | "TestWhitespaceCommas" | "Group_2_3"     |
| "Shape_2_3_3_1" | "Transform_2_3_3"      | "Group_2_3"     |
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