graph.Parse() creates a lot of blank nodes when parsing the official SHACL tests

[utrack]

Hi there! Thanks for supporting this 👍

I'm trying to parse the SHACL test suite in TTL format, but the output gives me a hell of a lot blank nodes. Can you please check why that's happening/did I do something wrong?

Test that I'm trying to parse: https://github.com/w3c/data-shapes/blob/gh-pages/data-shapes-test-suite/tests/core/property/and-001.ttl

Go code:

	g := rdf2go.NewGraph("", false)

	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}

	err = g.Parse(f, "text/turtle")
	if err != nil {
		return nil, err
	}


	var buf bytes.Buffer
	err = g.Serialize(&buf, "text/turtle")
	if err != nil {
		t.Fatal(err)
	}

	os.WriteFile("testmanual_result.ttl", buf.Bytes(), 0644)

Result (testmanual_result.ttl):

Details

_:a1
  <http://www.w3.org/ns/shacl#property> _:a2 .<http://datashapes.org/sh/tests/core/node/and-001.test#ValidRectangle1>
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle> ;
  <http://datashapes.org/sh/tests/core/node/and-001.test#width> "2"^^<http://www.w3.org/2001/XMLSchema#integer> ;
  <http://datashapes.org/sh/tests/core/node/and-001.test#height> "3"^^<http://www.w3.org/2001/XMLSchema#integer> ._:a6
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> </and-001> ._:a8
  <http://www.w3.org/ns/shacl#result> _:a10 ;
  <http://www.w3.org/ns/shacl#conforms> "false"^^<http://www.w3.org/2001/XMLSchema#boolean> ;
  <http://www.w3.org/ns/shacl#result> _:a9 ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/shacl#ValidationReport> ._:a10
  <http://www.w3.org/ns/shacl#sourceConstraintComponent> <http://www.w3.org/ns/shacl#AndConstraintComponent> ;
  <http://www.w3.org/ns/shacl#resultSeverity> <http://www.w3.org/ns/shacl#Violation> ;
  <http://www.w3.org/ns/shacl#sourceShape> <http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle> ;
  <http://www.w3.org/ns/shacl#focusNode> <http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle2> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/shacl#ValidationResult> ;
  <http://www.w3.org/ns/shacl#value> <http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle2> .<http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle2>
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle> ;
  <http://datashapes.org/sh/tests/core/node/and-001.test#width> "2"^^<http://www.w3.org/2001/XMLSchema#integer> .<http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle>
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2000/01/rdf-schema#Class> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/shacl#NodeShape> ;
  <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://www.w3.org/2000/01/rdf-schema#Resource> ;
  <http://www.w3.org/ns/shacl#and> _:a0 ._:a0
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:a3 ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:a1 ._:a5
  <http://www.w3.org/ns/shacl#minCount> "1"^^<http://www.w3.org/2001/XMLSchema#integer> ;
  <http://www.w3.org/ns/shacl#path> <http://datashapes.org/sh/tests/core/node/and-001.test#height> ._:a3
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:a4 ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .<>
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#Manifest> ;
  <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#entries> _:a6 ._:a2
  <http://www.w3.org/ns/shacl#minCount> "1"^^<http://www.w3.org/2001/XMLSchema#integer> ;
  <http://www.w3.org/ns/shacl#path> <http://datashapes.org/sh/tests/core/node/and-001.test#width> ._:a9
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/shacl#ValidationResult> ;
  <http://www.w3.org/ns/shacl#sourceConstraintComponent> <http://www.w3.org/ns/shacl#AndConstraintComponent> ;
  <http://www.w3.org/ns/shacl#focusNode> <http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle1> ;
  <http://www.w3.org/ns/shacl#sourceShape> <http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle> ;
  <http://www.w3.org/ns/shacl#resultSeverity> <http://www.w3.org/ns/shacl#Violation> ;
  <http://www.w3.org/ns/shacl#value> <http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle1> .<http://datashapes.org/sh/tests/core/node/and-001.test#InvalidRectangle1>
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://datashapes.org/sh/tests/core/node/and-001.test#Rectangle> ;
  <http://datashapes.org/sh/tests/core/node/and-001.test#height> "3"^^<http://www.w3.org/2001/XMLSchema#integer> ._:a7
  <http://www.w3.org/ns/shacl-test#dataGraph> <> ;
  <http://www.w3.org/ns/shacl-test#shapesGraph> <> ._:a4
  <http://www.w3.org/ns/shacl#property> _:a5 .</and-001>
  <http://www.w3.org/2000/01/rdf-schema#label> "Test of sh:and at node shape 001" ;
  <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#result> _:a8 ;
  <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#action> _:a7 ;
  <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#status> <http://www.w3.org/ns/shacl-test#approved> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/shacl-test#Validate> .

Tree explorer at https://www.semantechs.co.uk/turtle-editor-viewer/ :

Before

After

[utrack]

Hmm, the more I look at it, the more I think they're isomorphic...