diff --git a/packages/concerto-core/api.txt b/packages/concerto-core/api.txt
index b4f35ef91..decb297ac 100644
--- a/packages/concerto-core/api.txt
+++ b/packages/concerto-core/api.txt
@@ -174,6 +174,8 @@ class MapKeyType extends Decorated {
    + MapDeclaration getParent() 
    + string getType() 
    + String toString() 
+   + boolean isKey() 
+   + boolean isValue() 
 }
 class MapValueType extends Decorated {
    + void constructor(MapDeclaration,Object) throws IllegalModelException
@@ -182,6 +184,8 @@ class MapValueType extends Decorated {
    + MapDeclaration getParent() 
    + string getType() 
    + String toString() 
+   + boolean isKey() 
+   + boolean isValue() 
 }
    + ModelManager newMetaModelManager() 
    + object validateMetaModel() 
diff --git a/packages/concerto-core/changelog.txt b/packages/concerto-core/changelog.txt
index e2fb3352c..a8f18280b 100644
--- a/packages/concerto-core/changelog.txt
+++ b/packages/concerto-core/changelog.txt
@@ -24,6 +24,9 @@
 # Note that the latest public API is documented using JSDocs and is available in api.txt.
 #
 
+Version 3.8.0 {916069dbcaf3be63a2954371fec719d4c79002ff} 2023-08-1
+- Add To MapKeyType, MapValue functionality
+
 Version 3.7.0 {a97cb6ebd45679354ba4da1940d2bb8d} 2023-05-19
 - Add MapDeclaration, MapKeyType, AggregateValueType