diff --git a/cda-model/pom.xml b/cda-model/pom.xml
index f22defe38a6e24e7f9a9bcdcafa6f243a7b18e64..9afcb3ba66fd7fc62583c64d959775ad6499cf8b 100644
--- a/cda-model/pom.xml
+++ b/cda-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>cda-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -51,28 +51,28 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>voc-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>common-models</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>nblock-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>datatypes-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
 
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>model-resources</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>commons-io</groupId>
diff --git a/cdaepsos-model/pom.xml b/cdaepsos-model/pom.xml
index b81b551dc8fa47f2d988fa23f4b43ca0c951d95b..25f521ded50381d7e3b23f6d46504980471b45ce 100644
--- a/cdaepsos-model/pom.xml
+++ b/cdaepsos-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>cdaepsos-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
     
@@ -40,33 +40,33 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>voc-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>common-models</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>nblock-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>infr-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>datatypes-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
 
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>model-resources</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
 
 
diff --git a/common-models/pom.xml b/common-models/pom.xml
index 814668ee19a0f995a611aa06e9582acb572bad94..abf47c205f24251bac6987c1510cf09d3d656d4d 100644
--- a/common-models/pom.xml
+++ b/common-models/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>common-models</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 	
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>model-resources</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/datatypes-model/pom.xml b/datatypes-model/pom.xml
index b612834887af9b6d59413418f983811863044cc8..a1a484e6fecaf70680c6f6b6a779dfb9ac20b857 100644
--- a/datatypes-model/pom.xml
+++ b/datatypes-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>datatypes-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>common-models</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
 
 
diff --git a/infr-model/pom.xml b/infr-model/pom.xml
index 42179575f5c707847006552edd449cb669fdf286..3ce79f5ca00cecebafb99e4a78feafb3610f8315 100644
--- a/infr-model/pom.xml
+++ b/infr-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>infr-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -38,7 +38,7 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>datatypes-model</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
 
 
diff --git a/model-resources/pom.xml b/model-resources/pom.xml
index 56dc1283a06cc1d33244298c6968e64c470855ad..e0eb48b5ac2ebe1116d3c68b4fb6eb0ac1ad2e3e 100644
--- a/model-resources/pom.xml
+++ b/model-resources/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
@@ -14,7 +14,7 @@
 
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>model-resources</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
 
 
diff --git a/nblock-model/pom.xml b/nblock-model/pom.xml
index 7f91b97369eab0881bf563fe57d795a4f5173bba..d1c9f5d26669fb3ec43c8dd3762b1fb7a9c1e626 100644
--- a/nblock-model/pom.xml
+++ b/nblock-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>nblock-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -38,7 +38,7 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>model-resources</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/pom.xml b/pom.xml
index 4445e8532c8aa3c087314fb97a49e00a6b806119..f855f099dc910aa19fcee49d614fb04820bda167 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>net.ihe.gazelle</groupId>
     <artifactId>uml-models</artifactId>
     <name>UML Models</name>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>
diff --git a/voc-model/pom.xml b/voc-model/pom.xml
index 57fdc580d1566bb4212f67ea9fd8d0ae76e92480..66eb3044a08b1b0ce36d578cf025fbecb3a253a6 100644
--- a/voc-model/pom.xml
+++ b/voc-model/pom.xml
@@ -6,14 +6,14 @@
     <parent>
         <artifactId>uml-models</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.0.0-SNAPSHOT</version>
+        <version>3.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle.model</groupId>
     <artifactId>voc-model</artifactId>
-    <version>3.0.0-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
 
     <packaging>jar</packaging>
 
@@ -38,7 +38,7 @@
         <dependency>
             <groupId>net.ihe.gazelle.model</groupId>
             <artifactId>model-resources</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>3.1.0-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>