diff --git a/java/org/slub/rosetta/dps/repository/plugin/Validation/ValidateSchema.java b/java/org/slub/rosetta/dps/repository/plugin/Validation/ValidateSchema.java
index d304183330bdc4cf9f17627d9a177df109b4142e..5460787eb5e2c285ddbdfe255e3483e504575451 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/Validation/ValidateSchema.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/Validation/ValidateSchema.java
@@ -60,7 +60,10 @@ public class ValidateSchema {
                         this.validationResult = false;
                         throw new SAXException("RECURSIVE SCHEMA VALIDATOR: No entry for child namespace found: " + child_ns);
                     } else {
-                        assert (res.get().schemaType == ValidationSchemaType.schema);
+                        assert (
+                                res.get().schemaType == ValidationSchemaType.schema
+                                || res.get().schemaType == ValidationSchemaType.nonvalidating
+                        );
                         var schema = res.get();
                         internValidateFormatAgainstSchemaRecursively(childNodes.item(i), schema);
                     }
@@ -74,7 +77,10 @@ public class ValidateSchema {
 
     private boolean internValidateFormatAgainstSchemaRecursively(Node root, ValidationSchema validationSchema) throws IOException, SAXException {
         var schemaType = validationSchema.schemaType;
-        if (schemaType == ValidationSchemaType.schema) {
+        if (schemaType == ValidationSchemaType.nonvalidating) {
+            validationResult = true;
+            logger.debug("RECURSIVE SCHEMA VALIDATOR: nonvalidating namespace found, results in " + validationResult);
+        } else if (schemaType == ValidationSchemaType.schema) {
             ValidateSchema validator = new ValidateSchema( validationResourceResolver, logger );
             // Select validation roots from DOM
             validationResult = validator.validateAgainst(root, validationSchema.schemaURI);
@@ -82,8 +88,7 @@ public class ValidateSchema {
             if (validationResult) {
                 check_ns_of_childs(root);
             }
-        }
-        else {
+        } else {
             throw  new SAXException("RECURSIVE SCHEMA VALIDATOR: unsupported schema uri="+ validationSchema.schemaURI + " of type: " + validationSchema.schemaType);
         }
         return validationResult;