diff --git a/classes/CSVXMLValidator.php b/classes/CSVXMLValidator.php
new file mode 100644
index 0000000..118c2d2
--- /dev/null
+++ b/classes/CSVXMLValidator.php
@@ -0,0 +1,27 @@
+<?PHP
+/**
+ * Contains a helper class for validation errors.
+ *
+ * @author Nathan Eikermann <nathan@museum-digital.de>
+ */
+declare(strict_types = 1);
+/**
+ * Class holding the information about various errors
+ * that can occur during validation 
+ */
+final class CSVXMLValidator
+{
+    public array $error_msgs;
+    public array $inv_errors;
+    public array $depcon_errors;
+    
+    /**
+     * Constructor
+     */ 
+    public function __construct()
+    {
+        $error_msgs = [];
+        $inv_errors = [];
+        $depcon_errors = [];
+    }
+}
diff --git a/public/index3.php b/public/index3.php
index 57dceb9..0a38ee1 100644
--- a/public/index3.php
+++ b/public/index3.php
@@ -66,10 +66,10 @@ echo '</form>';
 ///// Check #1
 //echo '<pre>';print_r($allowed);echo '</pre>';
 echo '1: Only allowed tags (column names) used?';
-$fp = fopen ( $csv_datei, 'r' );
+$fp = fopen($csv_datei, 'r');
 $y = 1;
 $error = 0;
-$zeile = fgetcsv( $fp, 100000, ';' );
+$zeile = fgetcsv($fp, 100000, ';');
 $maxLoopLen = count($zeile);
 for ($x = 0; $x < $maxLoopLen; $x++) {
 
@@ -87,15 +87,13 @@ if ($error != 0) echo '<br><b style="color:#990000;">Not allowed tags found !</b
 
 //// Check #2
 echo '<br><br>2: Not allowed multiple use of tags (column names)?';
-//TODO: only check if the sizes are the same
 $compare = array_unique($zeile);
 
-$result = identical_values($zeile, $compare);
-if ($result == false) {
-    echo '<br><b style="color:#990000;">There are dublicate column names !</b>';
+if (count($zeile) != count($compare)) {
+    echo '<br><b style="color:#990000;">There are duplicate column names !</b>';
     $error = $error + 1;
 } else {
-    echo '<br><i style="font-style:normal;color:#009900;">No dublicate column names !</i>';
+    echo '<br><i style="font-style:normal;color:#009900;">No duplicate column names !</i>';
 }
 
 
@@ -125,7 +123,7 @@ $inv_error = 0;
  *
  * @return array
  */
-function get_duplicates(array $array):array 
+function Get_duplicates(array $array):array 
 {
     return array_unique(array_diff_assoc($array, array_unique($array)));
 
@@ -161,7 +159,7 @@ if ($inv_error == 0) {
 ///// Check #4
 echo '<br><br>4: Inventory_number unique ?';
 if (in_array('inventory_number', $erstezeile)) {
-    $doppelte_inv = get_duplicates($inv_array);
+    $doppelte_inv = Get_duplicates($inv_array);
     $doppelte_inv = array_values($doppelte_inv);
     if (!empty($doppelte_inv)) {
         foreach ($doppelte_inv as $tDublicateInvNo) {
@@ -182,18 +180,13 @@ echo '<br><br>5: Dependent colums observed ?<br>';
 
 // Check for correct handling of dependent fields
 foreach ($fieldsWithDependency as $tField => $tDependentFields) {
-    
-    //TODO: change order
-    if (array_search($tField, $erstezeile) === false) {
-        continue;
-    }
-
-    foreach ($tDependentFields as $tDependentField) {
-        if (array_search($tDependentField, $erstezeile) === false) {
-            $depencymessage[] = "Dependency issue at column $tField: Corresponding column $tDependentField is missing";
+    if (array_search($tField, $erstezeile) !== false) {
+        foreach ($tDependentFields as $tDependentField) {
+            if (array_search($tDependentField, $erstezeile) === false) {
+                $depencymessage[] = "Dependency issue at column $tField: Corresponding column $tDependentField is missing";
+            }
         }
     }
-
 }
 
 if (!empty($depencymessage)) {
@@ -210,6 +203,7 @@ if (!empty($depencymessage)) {
 echo '<br><br>6: Dependency of content observed?';
 
 //TODO: get the values for these arrays dynamically?
+// JRE: Maybe we can merge them into availablefields
 $crosscheck1 = ['object_other_title','detailed_description','detailed_description','inscription','inscription','dimensions_separate_length_value', 'dimensions_separate_width_value', 'dimensions_separate_height_value', 'dimensions_separate_diameter_value', 'dimensions_separate_wall_thickness_value', 'dimensions_separate_weight_value','closer_location','bought_for','worth_value','worth_insurance_value'];
 $crosscheck2 = ['object_other_title_kind_of','detailed_description_md','detailed_description_extern','inscription_md','inscription_extern','dimensions_separate_length_unit', 'dimensions_separate_width_unit', 'dimensions_separate_height_unit', 'dimensions_separate_diameter_unit', 'dimensions_separate_wall_thickness_unit', 'dimensions_separate_weight_unit','closer_location_as','bought_for_currency','worth_unit','worth_insurance_unit'];
 
@@ -287,34 +281,38 @@ for ($i = 2; $i <= $y; $i++) {
     foreach ($inhalt[$i] as $key => $value) {
 
         $columnName = $inhalt[1][$key];
-        // If the field is not restricted, then continue
-        if (!isset($fieldsWithAllowedValueSet[$columnName])) continue;
+        // Only do the check if the field is not restricted
+        if (isset($fieldsWithAllowedValueSet[$columnName])) {
 
-        // For others: check if the value is from the list of allowed values.
-        if (!in_array($value, $fieldsWithAllowedValueSet[$columnName])) {
+            // For others: check if the value is from the list of allowed values.
+            if (!in_array($value, $fieldsWithAllowedValueSet[$columnName])) {
 
-            // It may be that the value is empty together with all dependent fields,
-            // because it's in a repeat field that was needed earlier.
-            if (empty($value) && !empty($fieldsWithDependency[$columnName])) {
+                // It may be that the value is empty together with all dependent fields,
+                // because it's in a repeat field that was needed earlier.
+                if (empty($value) && !empty($fieldsWithDependency[$columnName])) {
 
-                $allDependentsEmpty = true;
-                foreach ($fieldsWithDependency[$columnName] as $depField) {
-                    // Find keys of dependent field
-                    $depFieldKey = array_search($depField, $inhalt[1]);
-                    if (!empty($inhalt[$i][$depFieldKey])) {
-                        $allDependentsEmpty = false;
-                        break;
+                    $allDependentsEmpty = true;
+                    foreach ($fieldsWithDependency[$columnName] as $depField) {
+                        // Find keys of dependent field
+                        $depFieldKey = array_search($depField, $inhalt[1]);
+                        if (!empty($inhalt[$i][$depFieldKey])) {
+                            $allDependentsEmpty = false;
+                            break;
+                        }
                     }
-                }
 
-                //TODO: reverse the IF and use it before the error message
-                if ($allDependentsEmpty === true) continue;
+                    if ($allDependentsEmpty !== true) {
+                        $errormessage[] = "Disallowed value in column <code>{$columnName}</code> on row <code>{$i}</code>: <em>"
+                            . $value . "</em> (allowed values: <small>" 
+                            . implode(", ", $fieldsWithAllowedValueSet[$columnName]) 
+                            . "</small>)";
+                    }
+
+                }
 
             }
 
-            $errormessage[] = "Disallowed value in column <code>{$columnName}</code> on row <code>{$i}</code>: <em>" . $value . "</em> (allowed values: <small>" . implode(", ", $fieldsWithAllowedValueSet[$columnName]) . "</small>)";
         }
-
     }
 }