diff --git a/validation-model/src/main/java/org/verapdf/gf/model/impl/pd/GFPDMetadata.java b/validation-model/src/main/java/org/verapdf/gf/model/impl/pd/GFPDMetadata.java
index 03c6b2ff3..6ccc4d6c3 100644
--- a/validation-model/src/main/java/org/verapdf/gf/model/impl/pd/GFPDMetadata.java
+++ b/validation-model/src/main/java/org/verapdf/gf/model/impl/pd/GFPDMetadata.java
@@ -84,6 +84,11 @@ public String getFilter() {
         return null;
     }
 
+    @Override
+    public Boolean getisCatalogMetadata() {
+        return isMainMetadata;
+    }
+
     @Override
     public List<? extends Object> getLinkedObjects(String link) {
         switch (link) {