diff --git a/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristic.java b/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristic.java
index 9f5f3bd18d8f31ff88b90f92bf26e4aa937df72b..0d8fdf6e1ce4704f3b97d98fc3c8d36ef48336cb 100644
--- a/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristic.java
+++ b/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristic.java
@@ -19,12 +19,18 @@
  */
 package org.etsi.osl.tmf.pcm620.model;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.etsi.osl.tmf.common.model.BaseEntity;
+import org.etsi.osl.tmf.scm633.model.ServiceSpecCharRelationship;
+import org.etsi.osl.tmf.scm633.model.ServiceSpecCharacteristicValue;
 import org.springframework.validation.annotation.Validated;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.persistence.CascadeType;
@@ -379,4 +385,113 @@ public class ProductSpecificationCharacteristic extends BaseEntity {
 		}
 		return o.toString().replace("\n", "\n    ");
 	}
+
+  public void updateWith(ProductSpecificationCharacteristic src) {
+    this.name = src.getName();
+    this.description = src.getDescription();
+    this.maxCardinality = src.getMaxCardinality();
+    this.minCardinality = src.getMinCardinality();
+    this.regex = src.getRegex();
+    this.isUnique =src.isUnique;
+    this.configurable =src.isConfigurable();
+    this.extensible =src.isExtensible();
+    this.valueType =src.valueType;
+
+    this.updateProductSpecCharacteristicValues(src.getProductSpecCharacteristicValue());
+    this.updateProductSpecCharRelationships(src.getProductSpecCharRelationship());
+
+  }
+
+
+  private void updateProductSpecCharacteristicValues(
+      @Valid Set<ProductSpecificationCharacteristicValue> srcSet) {
+    if ( srcSet == null ) {
+      return;
+    }
+    
+    Map<Integer, Boolean> idAddedUpdated = new HashMap<>();
+    /**
+     * update, add the incomings
+     */
+    for (ProductSpecificationCharacteristicValue r : srcSet) {
+  
+        boolean valueExists = false;
+        for (ProductSpecificationCharacteristicValue thisCharVal : this.productSpecCharacteristicValue) {
+            if ( thisCharVal.hashCode() == r.hashCode() ) {
+                valueExists = true;
+                idAddedUpdated.put(thisCharVal.hashCode(), true);
+                break;
+            }
+        }
+        
+        if (!valueExists) {
+            ProductSpecificationCharacteristicValue nr = new ProductSpecificationCharacteristicValue( r );
+            this.addProductSpecCharacteristicValueItem( nr );
+            idAddedUpdated.put( nr.hashCode(), true);
+        }
+        
+    }
+    
+    /**
+     * remove those that don't exist anymore
+     */
+    
+    List<ProductSpecificationCharacteristicValue> toRemove = new ArrayList<>();
+    for (ProductSpecificationCharacteristicValue ss : this.productSpecCharacteristicValue) {
+        if ( idAddedUpdated.get( ss.hashCode() ) == null ) {
+            toRemove.add(ss);
+        }
+    }
+    
+    for (ProductSpecificationCharacteristicValue r : toRemove) {
+        this.productSpecCharacteristicValue.remove(r);
+    }
+    
+    
+  }
+  
+
+  private void updateProductSpecCharRelationships(
+      @Valid Set<ProductSpecificationCharacteristicRelationship> productSpecCharRelationship2) {
+    
+    
+    Map< String, Boolean> idAddedUpdated = new HashMap<>();
+    /**
+     * update, add the incomings
+     */
+    for (ProductSpecificationCharacteristicRelationship r : productSpecCharRelationship2) {
+
+        boolean valueExists = false;
+        for (ProductSpecificationCharacteristicRelationship thisCharVal : this.productSpecCharRelationship) {
+            if ( (thisCharVal.getId()!=null) && (thisCharVal.getId().equals(r.getId() ) )) {
+                valueExists = true;
+                idAddedUpdated.put( thisCharVal.getId() , true);
+                break;
+            }
+        }
+        
+        if (!valueExists) {
+            this.productSpecCharRelationship.add( r.getNewProductSpecificationCharacteristicRelationship( r ));
+            idAddedUpdated.put( r.getId(), true);
+        }
+        
+    }
+    
+    /**
+     * remove those that don't exist anymore
+     */
+    
+    List<ProductSpecificationCharacteristicRelationship> toRemove = new ArrayList<>();
+    for (ProductSpecificationCharacteristicRelationship ss : this.productSpecCharRelationship) {
+        if ( idAddedUpdated.get( ss.getId() ) == null ) {
+            toRemove.add(ss);
+        }
+    }
+    
+    for (ProductSpecificationCharacteristicRelationship r : toRemove) {
+        this.productSpecCharRelationship.remove(r);
+    }
+    
+  }
+
 }
diff --git a/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristicRelationship.java b/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristicRelationship.java
index a3408039d45aee5f1ce84e12b44944b84e94875b..eb76610d2412c342d52b4cfb7d3b7e9c0f73c646 100644
--- a/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristicRelationship.java
+++ b/src/main/java/org/etsi/osl/tmf/pcm620/model/ProductSpecificationCharacteristicRelationship.java
@@ -23,6 +23,7 @@ import java.util.Objects;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.etsi.osl.tmf.common.model.BaseEntity;
+import org.etsi.osl.tmf.common.model.TimePeriod;
 import org.springframework.validation.annotation.Validated;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.persistence.Entity;
@@ -50,6 +51,18 @@ public class ProductSpecificationCharacteristicRelationship   extends BaseEntity
   private String relationshipType = null;
 
 
+  
+  public ProductSpecificationCharacteristicRelationship getNewProductSpecificationCharacteristicRelationship(
+      ProductSpecificationCharacteristicRelationship src) {
+    ProductSpecificationCharacteristicRelationship newp = new ProductSpecificationCharacteristicRelationship();
+    newp.name = src.name;
+    newp.relationshipType = src.relationshipType;
+    newp.validFor = new TimePeriod( src.validFor );
+    newp.id = src.id;
+    
+    return newp;
+  }
+
   public ProductSpecificationCharacteristicRelationship id(String id) {
     this.id = id;
     return this;