From 27f240f25ccc7c2abe20c58e87418afe1a6ca873 Mon Sep 17 00:00:00 2001
From: Elias Papanikitas <eliasp@inuits.eu>
Date: Tue, 9 Apr 2024 09:49:41 +0200
Subject: [PATCH 1/4] removed empty literals and uris

---
 ...0240316100500-delete-all-empty-uris.sparql | 25 +++++++++++++++++++
 ...327131000-delete-all-empty-literals.sparql | 20 +++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
 create mode 100644 config/migrations/2024/20240327131000-delete-all-empty-literals.sparql

diff --git a/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql b/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
new file mode 100644
index 0000000..722fc7f
--- /dev/null
+++ b/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
@@ -0,0 +1,25 @@
+DELETE {
+  GRAPH ?g {
+    ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type  ;
+      <http://mu.semte.ch/vocabularies/core/uuid> ?uuid . 
+  }
+}
+WHERE {
+  VALUES ?g {
+    <http://mu.semte.ch/graphs/administrative-unit>
+    <http://mu.semte.ch/graphs/worship-service>
+    <http://mu.semte.ch/graphs/public>
+    <http://mu.semte.ch/graphs/privacy-centric-graph>
+    <http://mu.semte.ch/graphs/worship-privacy-centric-graph>
+  }
+  GRAPH ?g {
+    ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type  ;
+      <http://mu.semte.ch/vocabularies/core/uuid> ?uuid .
+
+    FILTER NOT EXISTS {
+      FILTER (?p != <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>)
+      FILTER (?p != <http://mu.semte.ch/vocabularies/core/uuid>)
+      ?s ?p ?o .
+    }
+  }
+}
diff --git a/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql b/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql
new file mode 100644
index 0000000..48a6dfd
--- /dev/null
+++ b/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql
@@ -0,0 +1,20 @@
+DELETE {
+  GRAPH ?g { 
+    ?s ?p ?o .
+  }
+}
+WHERE {
+  VALUES ?g {
+    <http://mu.semte.ch/graphs/administrative-unit>
+    <http://mu.semte.ch/graphs/worship-service>
+    <http://mu.semte.ch/graphs/public>
+    <http://mu.semte.ch/graphs/privacy-centric-graph>
+    <http://mu.semte.ch/graphs/worship-privacy-centric-graph>
+  }
+  graph ?g {
+    ?s ?p ?o
+
+    Filter(?o = " " || ?o = "")
+
+  }
+}
\ No newline at end of file

From 857919804d6dbdeb4b3f95de7316d9ce042c6a97 Mon Sep 17 00:00:00 2001
From: Elias Papanikitas <eliasp@inuits.eu>
Date: Thu, 11 Apr 2024 10:22:07 +0200
Subject: [PATCH 2/4] used regex for filtering empty literals

---
 .../2024/20240327131000-delete-all-empty-literals.sparql      | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql b/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql
index 48a6dfd..8ae247b 100644
--- a/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql
+++ b/config/migrations/2024/20240327131000-delete-all-empty-literals.sparql
@@ -14,7 +14,7 @@ WHERE {
   graph ?g {
     ?s ?p ?o
 
-    Filter(?o = " " || ?o = "")
-
+    FILTER (isLiteral(?o))
+    FILTER regex(str(?o), "^\\s*$")
   }
 }
\ No newline at end of file

From c0fad917f1c9ca4b25d7bbaeb2d0c2591785e337 Mon Sep 17 00:00:00 2001
From: Elias Papanikitas <eliasp@inuits.eu>
Date: Thu, 11 Apr 2024 12:38:22 +0200
Subject: [PATCH 3/4] leave out structured identifiers from deletion

---
 .../2024/20240316100500-delete-all-empty-uris.sparql           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql b/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
index 722fc7f..5f95b8e 100644
--- a/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
+++ b/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
@@ -15,7 +15,8 @@ WHERE {
   GRAPH ?g {
     ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type  ;
       <http://mu.semte.ch/vocabularies/core/uuid> ?uuid .
-
+      
+    FILTER (?type != <https://data.vlaanderen.be/ns/generiek#GestructureerdeIdentificator>)
     FILTER NOT EXISTS {
       FILTER (?p != <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>)
       FILTER (?p != <http://mu.semte.ch/vocabularies/core/uuid>)

From 95e737873a3b39543f680cfb983123157be3643e Mon Sep 17 00:00:00 2001
From: Elias Papanikitas <eliasp@inuits.eu>
Date: Mon, 15 Apr 2024 11:52:42 +0200
Subject: [PATCH 4/4] removed migration for empty URIs

---
 ...0240316100500-delete-all-empty-uris.sparql | 26 -------------------
 1 file changed, 26 deletions(-)
 delete mode 100644 config/migrations/2024/20240316100500-delete-all-empty-uris.sparql

diff --git a/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql b/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
deleted file mode 100644
index 5f95b8e..0000000
--- a/config/migrations/2024/20240316100500-delete-all-empty-uris.sparql
+++ /dev/null
@@ -1,26 +0,0 @@
-DELETE {
-  GRAPH ?g {
-    ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type  ;
-      <http://mu.semte.ch/vocabularies/core/uuid> ?uuid . 
-  }
-}
-WHERE {
-  VALUES ?g {
-    <http://mu.semte.ch/graphs/administrative-unit>
-    <http://mu.semte.ch/graphs/worship-service>
-    <http://mu.semte.ch/graphs/public>
-    <http://mu.semte.ch/graphs/privacy-centric-graph>
-    <http://mu.semte.ch/graphs/worship-privacy-centric-graph>
-  }
-  GRAPH ?g {
-    ?s <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type  ;
-      <http://mu.semte.ch/vocabularies/core/uuid> ?uuid .
-      
-    FILTER (?type != <https://data.vlaanderen.be/ns/generiek#GestructureerdeIdentificator>)
-    FILTER NOT EXISTS {
-      FILTER (?p != <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>)
-      FILTER (?p != <http://mu.semte.ch/vocabularies/core/uuid>)
-      ?s ?p ?o .
-    }
-  }
-}