From 02f02606256fd7dc22015b671482c1759a1c5409 Mon Sep 17 00:00:00 2001
From: Daniel Hernandez <daniel@degu.cl>
Date: Sat, 28 Feb 2026 08:52:12 +0100
Subject: [PATCH] Add 1-hop and 2-hop example CONSTRUCT queries for step-01
 graph.

---
 queries/step_01_1hop_example.rq | 18 ++++++++++++++++++
 queries/step_01_2hop_example.rq | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 queries/step_01_1hop_example.rq
 create mode 100644 queries/step_01_2hop_example.rq

diff --git a/queries/step_01_1hop_example.rq b/queries/step_01_1hop_example.rq
new file mode 100644
index 0000000..ae937d9
--- /dev/null
+++ b/queries/step_01_1hop_example.rq
@@ -0,0 +1,18 @@
+PREFIX person: <http://example.org/migrants/person/>
+
+CONSTRUCT {
+  ?s ?p ?o .
+}
+WHERE {
+  {
+    # Triples about Irene Abendroth (as subject)
+    ?s ?p ?o .
+    FILTER(?s = person:AbeIre-00)
+  }
+  UNION
+  {
+    # Triples from other tables referencing Irene Abendroth
+    ?s ?p ?o .
+    ?s ?ref person:AbeIre-00 .
+  }
+}
diff --git a/queries/step_01_2hop_example.rq b/queries/step_01_2hop_example.rq
new file mode 100644
index 0000000..8b22004
--- /dev/null
+++ b/queries/step_01_2hop_example.rq
@@ -0,0 +1,33 @@
+PREFIX person: <http://example.org/migrants/person/>
+
+CONSTRUCT {
+  ?s ?p ?o .
+}
+WHERE {
+  {
+    # Hop 0: Triples about Irene Abendroth (as subject)
+    ?s ?p ?o .
+    FILTER(?s = person:AbeIre-00)
+  }
+  UNION
+  {
+    # Hop 1 (incoming): Triples about nodes referencing the anchor
+    ?s ?p ?o .
+    ?s ?ref person:AbeIre-00 .
+  }
+  UNION
+  {
+    # Hop 1 (outgoing): Triples about IRI nodes referenced by the anchor
+    ?s ?p ?o .
+    person:AbeIre-00 ?ref ?s .
+    FILTER(isIRI(?s))
+  }
+  UNION
+  {
+    # Hop 2: Triples about IRI nodes referenced by hop-1 nodes
+    ?s ?p ?o .
+    ?hop1 ?r1 person:AbeIre-00 .
+    ?hop1 ?r2 ?s .
+    FILTER(isIRI(?s) && ?s != person:AbeIre-00)
+  }
+}