diff --git a/coverage/pom.xml b/coverage/pom.xml
index b0cd31f1..e4cafe48 100644
--- a/coverage/pom.xml
+++ b/coverage/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>coverage</artifactId>
@@ -22,32 +22,32 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-engine</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-jackson</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-jdbc</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-parser</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-spark</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
     </dependencies>
     <build>
diff --git a/pom.xml b/pom.xml
index 80cdf0b4..2bf01a76 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <groupId>fr.insee.trevas</groupId>
     <artifactId>trevas-parent</artifactId>
     <packaging>pom</packaging>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
     <modules>
         <module>vtl-parser</module>
         <module>vtl-model</module>
diff --git a/vtl-csv/pom.xml b/vtl-csv/pom.xml
index 411d0e89..5de163a1 100644
--- a/vtl-csv/pom.xml
+++ b/vtl-csv/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-csv</artifactId>
     <name>VTL CSV</name>
     <description>CSV module for the VTL model</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.sf.supercsv</groupId>
diff --git a/vtl-engine/pom.xml b/vtl-engine/pom.xml
index a5022677..8214e86a 100644
--- a/vtl-engine/pom.xml
+++ b/vtl-engine/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-engine</artifactId>
     <name>VTL Engine</name>
     <description>VTL engine framework for Trevas</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -25,13 +25,13 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-parser</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
diff --git a/vtl-jackson/pom.xml b/vtl-jackson/pom.xml
index bb44f6c2..3a775a48 100644
--- a/vtl-jackson/pom.xml
+++ b/vtl-jackson/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-jackson</artifactId>
     <name>VTL Jackson</name>
     <description>Jackson module for the VTL model</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
diff --git a/vtl-jdbc/pom.xml b/vtl-jdbc/pom.xml
index f64365aa..95a0cbc8 100644
--- a/vtl-jdbc/pom.xml
+++ b/vtl-jdbc/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-jdbc</artifactId>
     <name>VTL JDBC</name>
     <description>Dataset wrapper around JDBC result set. Useful to expose SQL tables as VTL datasets</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -25,14 +25,14 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
 
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-engine</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
 
diff --git a/vtl-model/pom.xml b/vtl-model/pom.xml
index ac1a0dd2..87477bc4 100644
--- a/vtl-model/pom.xml
+++ b/vtl-model/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <dependencies>
@@ -21,7 +21,7 @@
     <artifactId>vtl-model</artifactId>
     <name>VTL Model</name>
     <description>Model describing VTL expressions and bindings</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
diff --git a/vtl-parser/pom.xml b/vtl-parser/pom.xml
index 38ce8531..0594d2d1 100644
--- a/vtl-parser/pom.xml
+++ b/vtl-parser/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-parser</artifactId>
     <name>VTL Parser</name>
     <description>Artifacts generated by Antlr from the VTL grammar files</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <!--    Warning: not lastest, align with version embedded by Spark-->
     <properties>
diff --git a/vtl-prov/pom.xml b/vtl-prov/pom.xml
index 9af676e4..ba4bd03a 100644
--- a/vtl-prov/pom.xml
+++ b/vtl-prov/pom.xml
@@ -7,14 +7,14 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <name>VTL Provenance</name>
     <description>Provenance static analysis</description>
 
     <artifactId>vtl-prov</artifactId>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -32,22 +32,22 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-parser</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-engine</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-spark</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
 
         <!-- Jena 5 requires Java 17+ -->
diff --git a/vtl-sdmx/pom.xml b/vtl-sdmx/pom.xml
index 3f6abf6d..b29d4a84 100644
--- a/vtl-sdmx/pom.xml
+++ b/vtl-sdmx/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-sdmx</artifactId>
     <name>VTL SDMX</name>
     <description>Dataset wrapper around SDMX</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <repositories>
         <repository>
@@ -40,24 +40,24 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-engine</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-csv</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-spark</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/vtl-spark/pom.xml b/vtl-spark/pom.xml
index 4e87204a..1ebe8be3 100644
--- a/vtl-spark/pom.xml
+++ b/vtl-spark/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>fr.insee.trevas</groupId>
         <artifactId>trevas-parent</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>vtl-spark</artifactId>
     <name>VTL Spark</name>
     <description>Trevas engine for Apache Spark</description>
-    <version>1.8.0</version>
+    <version>1.9.0-SNAPSHOT</version>
 
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>
@@ -25,13 +25,13 @@
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-model</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>fr.insee.trevas</groupId>
             <artifactId>vtl-engine</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>