Add "transform" stage that constructs graph inferences

tetras_extraction/macao_12/script/src/main.py

 import export
 import extract
+import transform
 
 
 def main():
     extract.main()
-    # transform.main()
+    transform.main()
     export.main()
 
 

tetras_extraction/macao_12/script/src/transform.py

+from rdflib import Graph
+
+from common import *
+
+
+def construct(g: Graph, query: str):
+    """Performs a SPARQL `CONSTRUCT` query and add the resulting triples
+    to the graph, in-place.
+    """
+    res = g.query(query)
+    if res.graph is not None:
+        g += res.graph
+
+
+def main():
+    # Load graph
+    graph = Graph()
+    graph.bind("", NS)
+    graph.parse(RDF_SCHEMA_FILE)
+    graph.parse(RDF_CONTENT_FILE)
+
+    construct(
+        graph,
+        """
+        CONSTRUCT {
+            ?exo a :ExerciceQC
+        } WHERE {
+            {
+                ?exo a :ExerciceQC_QCU
+            } UNION {
+                ?exo a :ExerciceQC_QCM
+            }
+        }""",
+    )
+
+    graph.serialize(RDF_FULL_FILE, "turtle", base=NS)