diff --git a/src/main/resources/alma/fix/item.fix b/src/main/resources/alma/fix/item.fix
index 034c6d6f8..2b2273d72 100644
--- a/src/main/resources/alma/fix/item.fix
+++ b/src/main/resources/alma/fix/item.fix
@@ -128,7 +128,7 @@ end
 
 set_array("@callNumberRvk[]")
 do list(path:"hasItem[]","var":"$i")
-  if any_match("$i.callNumber","[A-Z][A-Z] \\d{3,6} .*")
+  if any_match("$i.callNumber","([A-Z]{2} \\d{3,6})(\\.\\d*)?( [A-Z]\\d+)+([\\.\\d\\-\\(\\)+]*)?")
     copy_field("$i.callNumber","@callNumberRvk[].$append")
   end
 end
diff --git a/src/test/resources/alma-fix/990109712970206441.json b/src/test/resources/alma-fix/990109712970206441.json
index b1faac40f..68e217a14 100644
--- a/src/test/resources/alma-fix/990109712970206441.json
+++ b/src/test/resources/alma-fix/990109712970206441.json
@@ -213,13 +213,6 @@
       "gndIdentifier" : "2085343-9",
       "altLabel" : [ "Beethoven-Haus", "Bonner Beethoven-Haus", "Bonner Beethovenhaus" ]
     } ]
-  }, {
-    "notation" : "BM 800",
-    "type" : [ "Concept" ],
-    "source" : {
-      "label" : "RVK (Regensburger Verbundklassifikation)",
-      "id" : "https://d-nb.info/gnd/4449787-8"
-    }
   } ],
   "spatial" : [ {
     "id" : "https://nwbib.de/spatial#Q586",
diff --git a/src/test/resources/alma-fix/990122511970206441.json b/src/test/resources/alma-fix/990122511970206441.json
index 8517b40b4..273db2b83 100644
--- a/src/test/resources/alma-fix/990122511970206441.json
+++ b/src/test/resources/alma-fix/990122511970206441.json
@@ -83,14 +83,6 @@
     "type" : [ "Work" ]
   },
   "extent" : "2 CD : DDD + Beih.",
-  "subject" : [ {
-    "notation" : "CD 2410",
-    "type" : [ "Concept" ],
-    "source" : {
-      "label" : "RVK (Regensburger Verbundklassifikation)",
-      "id" : "https://d-nb.info/gnd/4449787-8"
-    }
-  } ],
   "hasItem" : [ {
     "label" : "lobid Bestandsressource",
     "type" : [ "Item", "PhysicalObject" ],
diff --git a/src/test/resources/alma-fix/990210237770206441.json b/src/test/resources/alma-fix/990210237770206441.json
index 149d305e6..7ae021db8 100644
--- a/src/test/resources/alma-fix/990210237770206441.json
+++ b/src/test/resources/alma-fix/990210237770206441.json
@@ -91,21 +91,6 @@
   } ],
   "extent" : "1 Partitur (12 Seiten)",
   "note" : [ "Hier auch später erschienene, unveränderte Nachdrucke" ],
-  "subject" : [ {
-    "notation" : "NV 102",
-    "type" : [ "Concept" ],
-    "source" : {
-      "label" : "RVK (Regensburger Verbundklassifikation)",
-      "id" : "https://d-nb.info/gnd/4449787-8"
-    }
-  }, {
-    "notation" : "NB 2023",
-    "type" : [ "Concept" ],
-    "source" : {
-      "label" : "RVK (Regensburger Verbundklassifikation)",
-      "id" : "https://d-nb.info/gnd/4449787-8"
-    }
-  } ],
   "hasItem" : [ {
     "label" : "lobid Bestandsressource",
     "type" : [ "Item", "PhysicalObject" ],
diff --git a/src/test/resources/alma-fix/99370771475306441.json b/src/test/resources/alma-fix/99370771475306441.json
index 09edd862e..16ba4004b 100644
--- a/src/test/resources/alma-fix/99370771475306441.json
+++ b/src/test/resources/alma-fix/99370771475306441.json
@@ -245,13 +245,6 @@
       "id" : "https://d-nb.info/gnd/4181939-1",
       "gndIdentifier" : "4181939-1"
     } ]
-  }, {
-    "notation" : "MS 6020",
-    "type" : [ "Concept" ],
-    "source" : {
-      "label" : "RVK (Regensburger Verbundklassifikation)",
-      "id" : "https://d-nb.info/gnd/4449787-8"
-    }
   } ],
   "subjectslabels" : [ "Altern", "Berufliche Stellung", "Bildung", "Einkommensungleichheit", "Gesundheit", "Gesundheitspolitik", "Krankheit", "Soziale Benachteiligung", "Soziale Gerechtigkeit", "Soziale Ungleichheit, Armut, Rassismus", "Gesundheitssoziologie, Medizinsoziologie", "Wirtschaftssoziologie, Arbeitssoziologie, Organisationssoziologie", "Soziale Ungleichheit", "Teilhabe", "Gesundheitswesen", "Sozialer Friede" ],
   "hasItem" : [ {