diff --git a/tools/src/main/java/com/nedap/archie/FixedValueFiller.java b/tools/src/main/java/com/nedap/archie/FixedValueFiller.java
new file mode 100644
index 000000000..c558a3368
--- /dev/null
+++ b/tools/src/main/java/com/nedap/archie/FixedValueFiller.java
@@ -0,0 +1,146 @@
+package com.nedap.archie;
+
+import com.nedap.archie.aom.CAttribute;
+import com.nedap.archie.aom.CObject;
+import com.nedap.archie.aom.CPrimitiveObject;
+import com.nedap.archie.aom.primitives.COrdered;
+import com.nedap.archie.aom.primitives.CString;
+import com.nedap.archie.base.Interval;
+import com.nedap.archie.query.RMObjectWithPath;
+import com.nedap.archie.rminfo.ModelInfoLookup;
+import com.nedap.archie.rminfo.RMAttributeInfo;
+import com.nedap.archie.rmobjectvalidator.APathQueryCache;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Fills fixed values from the archetype if the corresponding values are missing in the RM objects
+ */
+public class FixedValueFiller {
+
+    private final ModelInfoLookup lookup;
+
+    private final APathQueryCache queryCache = new APathQueryCache();
+
+    public FixedValueFiller(ModelInfoLookup lookup) {
+        this.lookup = lookup;
+    }
+
+    /**
+     * Recursively fill fixed values.
+     *
+     * @param rmObject RM object to fill fixed values in.
+     * @param cObject CObject to retrieve the fixed values from.
+     */
+    public void fillFixedValues(Object rmObject, CObject cObject) {
+        // Do not process the constraint if the constraint type is not assignable from the data type
+        // Examples:
+        // - DV_CODED_TEXT constraint with DV_TEXT data: do not continue
+        // - DV_TEXT constraint with DV_TEXT data: continue
+        // - DV_TEXT constraint with DV_CODED_TEXT data: continue
+        Class<?> rmClassOfCObject = lookup.getClass(cObject.getRmTypeName());
+        if(rmClassOfCObject != null && !rmClassOfCObject.isAssignableFrom(rmObject.getClass())) {
+            return; //stop filling fixed values, the types do not match
+        }
+
+        for (CAttribute cAttribute : cObject.getAttributes()) {
+            fillFixedValues(rmObject, cAttribute);
+        }
+    }
+
+    /**
+     * Recursively fill fixed values for an attribute.
+     *
+     * @param rmObject RM object to fill fixed values in.
+     * @param cAttribute CAttribute to retrieve the fixed values from.
+     */
+    private void fillFixedValues(Object rmObject, CAttribute cAttribute) {
+        if(cAttribute.getChildren() == null) {
+            return;
+        }
+        
+        String rmAttributeName = cAttribute.getRmAttributeName();
+        RMAttributeInfo attributeInfo = lookup.getAttributeInfo(rmObject.getClass(), rmAttributeName);
+
+        if(!attributeInfo.isMultipleValued() && getValue(rmObject, attributeInfo) == null && cAttribute.getChildren().size() == 1) {
+            // Fill fixed value (if any) if the attribute is singular, empty and has only one constraint.
+            CObject cObject = cAttribute.getChildren().get(0);
+            if (cObject instanceof CPrimitiveObject) {
+                Object fixedValue = getPrimitiveFixedValue((CPrimitiveObject<?, ?>) cObject);
+                if (fixedValue != null) {
+                    setValue(rmObject, attributeInfo, fixedValue);
+                }
+            }
+        } else {
+            // Recursively fill fixed values for the exising values
+            for (CObject cObject : cAttribute.getChildren()) {
+                List<RMObjectWithPath> values;
+                values = queryCache.getApathQuery("/" + rmAttributeName + "[" + cObject.getNodeId() + "]").findList(lookup, rmObject);
+
+                for (RMObjectWithPath rmObjectWithPath : values) {
+                    fillFixedValues(rmObjectWithPath.getObject(), cObject);
+                }
+            }
+        }
+    }
+
+    private Object getPrimitiveFixedValue(CPrimitiveObject<?, ?> cobject) {
+        Object fixedValue = getFixedValue(cobject);
+        if(fixedValue != null) {
+            return lookup.convertConstrainedPrimitiveToRMObject(fixedValue);
+        } else {
+            return null;
+        }
+    }
+
+    private static Object getFixedValue(CPrimitiveObject<?, ?> cObject) {
+        if(cObject instanceof COrdered) {
+            return getFixedValueForOrdered((COrdered<?>) cObject);
+        } else if (cObject instanceof CString) {
+            return getFixedValueForString((CString) cObject);
+        }
+        return null;
+    }
+
+    private static Object getFixedValueForString(CString cString) {
+        List<String> constraint = cString.getConstraint();
+        if(constraint != null && constraint.size() == 1) {
+            String singleConstraint = constraint.get(0);
+            if(!CString.isRegexConstraint(singleConstraint)) {
+                return singleConstraint;
+            }
+        }
+        return null;
+    }
+
+    private static <T> Object getFixedValueForOrdered(COrdered<T> cOrdered) {
+        List<Interval<T>> constraint = cOrdered.getConstraint();
+        if(constraint != null && constraint.size() == 1) {
+            Interval<T> interval = constraint.get(0);
+            if(!interval.isLowerUnbounded() && !interval.isUpperUnbounded() &&
+                    interval.isLowerIncluded() && interval.isUpperIncluded()
+                    && Objects.equals(interval.getLower(), interval.getUpper())) {
+                return interval.getLower();
+            }
+        }
+        return null;
+    }
+
+    private Object getValue(Object rmObject, RMAttributeInfo attributeInfo) throws IllegalArgumentException {
+        try {
+            return attributeInfo.getGetMethod().invoke(rmObject);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void setValue(Object rmObject, RMAttributeInfo attributeInfo, Object value) throws IllegalArgumentException {
+        try {
+            attributeInfo.getSetMethod().invoke(rmObject, value);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}