diff --git a/README.md b/README.md
index dad8a38..0309815 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Add this dependency to your project's POM:
 <dependency>
   <groupId>org.omg.sysml</groupId>
   <artifactId>sysml-v2-api-client</artifactId>
-  <version>2020-05</version>
+  <version>2020-06</version>
   <scope>compile</scope>
 </dependency>
 ```
@@ -49,7 +49,7 @@ Add this dependency to your project's POM:
 Add this dependency to your project's build file:
 
 ```groovy
-compile "org.omg.sysml:sysml-v2-api-client:2020-05"
+compile "org.omg.sysml:sysml-v2-api-client:2020-06"
 ```
 
 ### Others
@@ -62,7 +62,7 @@ mvn clean package
 
 Then manually install the following JARs:
 
-* `target/sysml-v2-api-client-2020-05.jar`
+* `target/sysml-v2-api-client-2020-06.jar`
 * `target/lib/*.jar`
 
 ## Getting Started
diff --git a/build.gradle b/build.gradle
index 752bb08..4a70391 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'eclipse'
 apply plugin: 'java'
 
 group = 'org.omg.sysml'
-version = '2020-05'
+version = '2020-06'
 
 buildscript {
     repositories {
diff --git a/build.sbt b/build.sbt
index ec52ef4..4a21dbe 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ lazy val root = (project in file(".")).
   settings(
     organization := "org.omg.sysml",
     name := "sysml-v2-api-client",
-    version := "2020-05",
+    version := "2020-06",
     scalaVersion := "2.11.4",
     scalacOptions ++= Seq("-feature"),
     javacOptions in compile ++= Seq("-Xlint:deprecation"),
diff --git a/docs/RelationshipApi.md b/docs/RelationshipApi.md
index 52b254f..61ebab3 100644
--- a/docs/RelationshipApi.md
+++ b/docs/RelationshipApi.md
@@ -9,7 +9,7 @@ Method | HTTP request | Description
 
 <a name="getRelationshipsByProjectCommitRelatedElement"></a>
 # **getRelationshipsByProjectCommitRelatedElement**
-> List&lt;Relationship&gt; getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId)
+> List&lt;Relationship&gt; getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId, direction)
 
 Get relationships by project, commit, and related element.
 
@@ -31,8 +31,9 @@ public class Example {
     UUID projectId = new UUID(); // UUID | ID of the project
     UUID commitId = new UUID(); // UUID | ID of the commit
     UUID relatedElementId = new UUID(); // UUID | ID of the related element
+    String direction = "both"; // String | Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element
     try {
-      List<Relationship> result = apiInstance.getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId);
+      List<Relationship> result = apiInstance.getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId, direction);
       System.out.println(result);
     } catch (ApiException e) {
       System.err.println("Exception when calling RelationshipApi#getRelationshipsByProjectCommitRelatedElement");
@@ -52,6 +53,7 @@ Name | Type | Description  | Notes
  **projectId** | [**UUID**](.md)| ID of the project |
  **commitId** | [**UUID**](.md)| ID of the commit |
  **relatedElementId** | [**UUID**](.md)| ID of the related element |
+ **direction** | **String**| Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element | [optional] [default to both] [enum: in, out, both]
 
 ### Return type
 
diff --git a/pom.xml b/pom.xml
index 5361656..60a8470 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <artifactId>sysml-v2-api-client</artifactId>
     <packaging>jar</packaging>
     <name>sysml-v2-api-client</name>
-    <version>2020-05</version>
+    <version>2020-06</version>
     <url>https://github.com/openapitools/openapi-generator</url>
     <description>OpenAPI Java</description>
     <scm>
diff --git a/src/main/java/org/omg/sysml/ApiClient.java b/src/main/java/org/omg/sysml/ApiClient.java
index 4cc6624..f8d2e71 100644
--- a/src/main/java/org/omg/sysml/ApiClient.java
+++ b/src/main/java/org/omg/sysml/ApiClient.java
@@ -97,7 +97,7 @@ private void init() {
         json = new JSON();
 
         // Set default User-Agent.
-        setUserAgent("OpenAPI-Generator/2020-05/java");
+        setUserAgent("OpenAPI-Generator/2020-06/java");
 
         authentications = new HashMap<String, Authentication>();
     }
diff --git a/src/main/java/org/omg/sysml/api/RelationshipApi.java b/src/main/java/org/omg/sysml/api/RelationshipApi.java
index 559946c..c740ad5 100644
--- a/src/main/java/org/omg/sysml/api/RelationshipApi.java
+++ b/src/main/java/org/omg/sysml/api/RelationshipApi.java
@@ -61,6 +61,7 @@ public void setApiClient(ApiClient apiClient) {
      * @param projectId ID of the project (required)
      * @param commitId ID of the commit (required)
      * @param relatedElementId ID of the related element (required)
+     * @param direction Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element (optional, default to both)
      * @param _callback Callback for upload/download progress
      * @return Call to execute
      * @throws ApiException If fail to serialize the request body object
@@ -73,7 +74,7 @@ public void setApiClient(ApiClient apiClient) {
         <tr><td> 0 </td><td> Unexpected response. </td><td>  -  </td></tr>
      </table>
      */
-    public okhttp3.Call getRelationshipsByProjectCommitRelatedElementCall(UUID projectId, UUID commitId, UUID relatedElementId, final ApiCallback _callback) throws ApiException {
+    public okhttp3.Call getRelationshipsByProjectCommitRelatedElementCall(UUID projectId, UUID commitId, UUID relatedElementId, String direction, final ApiCallback _callback) throws ApiException {
         Object localVarPostBody = null;
 
         // create path and map variables
@@ -84,6 +85,10 @@ public okhttp3.Call getRelationshipsByProjectCommitRelatedElementCall(UUID proje
 
         List<Pair> localVarQueryParams = new ArrayList<Pair>();
         List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        if (direction != null) {
+            localVarQueryParams.addAll(localVarApiClient.parameterToPair("direction", direction));
+        }
+
         Map<String, String> localVarHeaderParams = new HashMap<String, String>();
         Map<String, String> localVarCookieParams = new HashMap<String, String>();
         Map<String, Object> localVarFormParams = new HashMap<String, Object>();
@@ -106,7 +111,7 @@ public okhttp3.Call getRelationshipsByProjectCommitRelatedElementCall(UUID proje
     }
 
     @SuppressWarnings("rawtypes")
-    private okhttp3.Call getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(UUID projectId, UUID commitId, UUID relatedElementId, final ApiCallback _callback) throws ApiException {
+    private okhttp3.Call getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(UUID projectId, UUID commitId, UUID relatedElementId, String direction, final ApiCallback _callback) throws ApiException {
         
         // verify the required parameter 'projectId' is set
         if (projectId == null) {
@@ -124,7 +129,7 @@ private okhttp3.Call getRelationshipsByProjectCommitRelatedElementValidateBefore
         }
         
 
-        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementCall(projectId, commitId, relatedElementId, _callback);
+        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementCall(projectId, commitId, relatedElementId, direction, _callback);
         return localVarCall;
 
     }
@@ -135,6 +140,7 @@ private okhttp3.Call getRelationshipsByProjectCommitRelatedElementValidateBefore
      * @param projectId ID of the project (required)
      * @param commitId ID of the commit (required)
      * @param relatedElementId ID of the related element (required)
+     * @param direction Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element (optional, default to both)
      * @return List&lt;Relationship&gt;
      * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
      * @http.response.details
@@ -146,8 +152,8 @@ private okhttp3.Call getRelationshipsByProjectCommitRelatedElementValidateBefore
         <tr><td> 0 </td><td> Unexpected response. </td><td>  -  </td></tr>
      </table>
      */
-    public List<Relationship> getRelationshipsByProjectCommitRelatedElement(UUID projectId, UUID commitId, UUID relatedElementId) throws ApiException {
-        ApiResponse<List<Relationship>> localVarResp = getRelationshipsByProjectCommitRelatedElementWithHttpInfo(projectId, commitId, relatedElementId);
+    public List<Relationship> getRelationshipsByProjectCommitRelatedElement(UUID projectId, UUID commitId, UUID relatedElementId, String direction) throws ApiException {
+        ApiResponse<List<Relationship>> localVarResp = getRelationshipsByProjectCommitRelatedElementWithHttpInfo(projectId, commitId, relatedElementId, direction);
         return localVarResp.getData();
     }
 
@@ -157,6 +163,7 @@ public List<Relationship> getRelationshipsByProjectCommitRelatedElement(UUID pro
      * @param projectId ID of the project (required)
      * @param commitId ID of the commit (required)
      * @param relatedElementId ID of the related element (required)
+     * @param direction Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element (optional, default to both)
      * @return ApiResponse&lt;List&lt;Relationship&gt;&gt;
      * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
      * @http.response.details
@@ -168,8 +175,8 @@ public List<Relationship> getRelationshipsByProjectCommitRelatedElement(UUID pro
         <tr><td> 0 </td><td> Unexpected response. </td><td>  -  </td></tr>
      </table>
      */
-    public ApiResponse<List<Relationship>> getRelationshipsByProjectCommitRelatedElementWithHttpInfo(UUID projectId, UUID commitId, UUID relatedElementId) throws ApiException {
-        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(projectId, commitId, relatedElementId, null);
+    public ApiResponse<List<Relationship>> getRelationshipsByProjectCommitRelatedElementWithHttpInfo(UUID projectId, UUID commitId, UUID relatedElementId, String direction) throws ApiException {
+        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(projectId, commitId, relatedElementId, direction, null);
         Type localVarReturnType = new TypeToken<List<Relationship>>(){}.getType();
         return localVarApiClient.execute(localVarCall, localVarReturnType);
     }
@@ -180,6 +187,7 @@ public ApiResponse<List<Relationship>> getRelationshipsByProjectCommitRelatedEle
      * @param projectId ID of the project (required)
      * @param commitId ID of the commit (required)
      * @param relatedElementId ID of the related element (required)
+     * @param direction Filter for relationships that are incoming (in), outgoing (out), or both relative to the related element (optional, default to both)
      * @param _callback The callback to be executed when the API call finishes
      * @return The request call
      * @throws ApiException If fail to process the API call, e.g. serializing the request body object
@@ -192,9 +200,9 @@ public ApiResponse<List<Relationship>> getRelationshipsByProjectCommitRelatedEle
         <tr><td> 0 </td><td> Unexpected response. </td><td>  -  </td></tr>
      </table>
      */
-    public okhttp3.Call getRelationshipsByProjectCommitRelatedElementAsync(UUID projectId, UUID commitId, UUID relatedElementId, final ApiCallback<List<Relationship>> _callback) throws ApiException {
+    public okhttp3.Call getRelationshipsByProjectCommitRelatedElementAsync(UUID projectId, UUID commitId, UUID relatedElementId, String direction, final ApiCallback<List<Relationship>> _callback) throws ApiException {
 
-        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(projectId, commitId, relatedElementId, _callback);
+        okhttp3.Call localVarCall = getRelationshipsByProjectCommitRelatedElementValidateBeforeCall(projectId, commitId, relatedElementId, direction, _callback);
         Type localVarReturnType = new TypeToken<List<Relationship>>(){}.getType();
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
diff --git a/src/test/java/org/omg/sysml/api/RelationshipApiTest.java b/src/test/java/org/omg/sysml/api/RelationshipApiTest.java
index 81a9cec..d5f1757 100644
--- a/src/test/java/org/omg/sysml/api/RelationshipApiTest.java
+++ b/src/test/java/org/omg/sysml/api/RelationshipApiTest.java
@@ -47,7 +47,8 @@ public void getRelationshipsByProjectCommitRelatedElementTest() throws ApiExcept
         UUID projectId = null;
         UUID commitId = null;
         UUID relatedElementId = null;
-        List<Relationship> response = api.getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId);
+        String direction = null;
+        List<Relationship> response = api.getRelationshipsByProjectCommitRelatedElement(projectId, commitId, relatedElementId, direction);
 
         // TODO: test validations
     }