diff --git a/ch.psi.fda.core/pom.xml b/ch.psi.fda.core/pom.xml
index 3760ed7..5234610 100644
--- a/ch.psi.fda.core/pom.xml
+++ b/ch.psi.fda.core/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>ch.psi</groupId>
 	<artifactId>ch.psi.fda.core</artifactId>
-	<version>2.3.0</version>
+	<version>2.3.1</version>
 
 	<dependencies>
 		<dependency>
diff --git a/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/LinePlot.java b/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/LinePlot.java
index 213234c..adaca5d 100644
--- a/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/LinePlot.java
+++ b/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/LinePlot.java
@@ -13,6 +13,7 @@ public class LinePlot extends Plot {
 	
 	private Double minX;
 	private Double maxX;
+        private Integer maxSeries;
 
 	public LinePlot(){
 	}
@@ -42,4 +43,11 @@ public class LinePlot extends Plot {
 	public void setMaxX(Double maxX) {
 		this.maxX = maxX;
 	}
+	@XmlAttribute
+	public Integer getMaxSeries() {
+		return maxSeries;
+	}
+	public void setMaxSeries(Integer maxSeries) {
+		this.maxSeries = maxSeries;
+	}
 }
diff --git a/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/MatrixPlot.java b/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/MatrixPlot.java
index 078f8d6..c7ac61e 100644
--- a/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/MatrixPlot.java
+++ b/ch.psi.fda.core/src/main/java/ch/psi/fda/vdescriptor/MatrixPlot.java
@@ -18,6 +18,8 @@ public class MatrixPlot extends Plot {
 	private Double minY;
 	private Double maxY;
 	private Integer nY;
+        
+        private String type;
 	
 	public MatrixPlot(){
 	}
@@ -75,4 +77,11 @@ public class MatrixPlot extends Plot {
 	public void setnY(Integer nY) {
 		this.nY = nY;
 	}
+	@XmlAttribute
+	public String getType() {            
+            return type;
+	}
+	public void setType(String type) {
+		this.type = type;
+	}
 }