diff --git a/java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java b/java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java
index 13ce3b958dd648fdf083b566e1b99cac7fb27f0a..fedae34c99e8395db3b31c7d886ed32fec11bbda 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java
@@ -75,6 +75,7 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
     private boolean wellformed = false;
     private final DocumentBuilderFactory dbf = DocumentBuilderFactory.newDefaultInstance();
     private List<String> errors = new ArrayList<>();
+    private List<String> detail = new ArrayList<>();
     private static final HashSet<validationSchema> namespaceSchemaMap = new HashSet<>() {
         {
             add(new validationSchema("http://www.loc.gov/standards/alto/ns-v2#", schema, "http://www.loc.gov/standards/alto/alto-v2.0.xsd"));
@@ -167,6 +168,8 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
             DocumentBuilder db = dbf.newDocumentBuilder();
             Document doc = db.parse(new File(filePath));
             xmlInfoRecord info = getXMLinfo(doc);
+            detail.add("detect XML type via NS:" + info.nameSpaceUri);
+
             printXMLinfo(doc);
             if (!info.xmlVersion.equals("1.0")) {
                 reportError("not an expected XML 1.0 document, found " + info.xmlVersion, filePath);
@@ -175,6 +178,7 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
                 return false;
             }
             wellformed=true;
+            detail.add("checked XML is wellformed");
             /* TODO: align corresponding Schema based on systemID */
             var schema = assignSchema(doc);
             if (schema.isEmpty()) {
@@ -182,6 +186,9 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
                 valid = false;
                 return false;
             }
+            detail.add("assigned schema of type: " + schema.get().schemaType);
+            detail.add("assigned schema url: " + schema.get().schemaURL);
+
             // TODO: SAXParser parser = spf.newSAXParser();
             //      parser.setProperty(CatalogFeatures.Feature.FILES.getPropertyName(), "catalog.xml");
 
@@ -227,6 +234,11 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
         return null;
     }
 
+    @Override
+    public String getValidationDetails() {
+        return detail.stream().reduce("", (all, res) -> all.concat("\n") .concat(res) );
+    }
+
     /** stand-alone check, main file to call local installed clamd
      * @param args list of files which should be scanned
      */
diff --git a/java/org/slub/rosetta/dps/repository/plugin/TestSLUBXmlFormatValidationPlugin.java b/java/org/slub/rosetta/dps/repository/plugin/TestSLUBXmlFormatValidationPlugin.java
index 35fc96f34332c72e513706e757ac039cd78e6c3f..9e49193e1967948fa2470875aaac598536cbcda5 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/TestSLUBXmlFormatValidationPlugin.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/TestSLUBXmlFormatValidationPlugin.java
@@ -9,8 +9,8 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.stream.Stream;
 
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.*;
+
 /**
  * Tests for {@link SLUBXmlFormatValidationPlugin}.
  *
@@ -20,9 +20,7 @@ import static org.junit.Assert.assertTrue;
 @RunWith(JUnit4.class)
 public class TestSLUBXmlFormatValidationPlugin {
     private static SLUBXmlFormatValidationPlugin mock;
-
-
-
+    
     private Path[] testPaths;
     @Before
     public void setUp() {
@@ -43,6 +41,7 @@ public class TestSLUBXmlFormatValidationPlugin {
             assertFalse("validateFormat(" + path + "), returns valid?", mock.validateFormat(path.toString()));
             assertFalse("validateFormat(" + path + "), is valid?", mock.validateFormat(path.toString()));
             assertTrue( "validateFormat(" + path + "), is wellformed?", mock.isWellFormed());
+            assertNotNull("getValidationDetails(), " + path + ", not null", mock.getValidationDetails());
         }
     }
 }