diff --git a/core/org.eclipse.statet.rj.services.core/META-INF/MANIFEST.MF b/core/org.eclipse.statet.rj.services.core/META-INF/MANIFEST.MF
index 69efe64..054f26c 100644
--- a/core/org.eclipse.statet.rj.services.core/META-INF/MANIFEST.MF
+++ b/core/org.eclipse.statet.rj.services.core/META-INF/MANIFEST.MF
@@ -14,7 +14,8 @@
  org.eclipse.statet.jcommons.lang;version="4.4.0",
  org.eclipse.statet.jcommons.runtime;version="4.4.0",
  org.eclipse.statet.jcommons.status;version="4.4.0",
- org.eclipse.statet.jcommons.ts.core;version="4.4.0";resolution:=optional
+ org.eclipse.statet.jcommons.ts.core;version="4.4.0";resolution:=optional,
+ org.eclipse.statet.jcommons.util;version="4.4.0"
 Export-Package: org.eclipse.statet.rj.graphic.core;version="4.4.0",
  org.eclipse.statet.rj.graphic.core.util;version="4.4.0",
  org.eclipse.statet.rj.renv.core;version="4.4.0",
diff --git a/core/org.eclipse.statet.rj.services.core/src/org/eclipse/statet/rj/services/RVersion.java b/core/org.eclipse.statet.rj.services.core/src/org/eclipse/statet/rj/services/RVersion.java
index df32c37..c1a30b2 100644
--- a/core/org.eclipse.statet.rj.services.core/src/org/eclipse/statet/rj/services/RVersion.java
+++ b/core/org.eclipse.statet.rj.services.core/src/org/eclipse/statet/rj/services/RVersion.java
@@ -16,174 +16,25 @@
 
 import org.eclipse.statet.jcommons.lang.NonNullByDefault;
 import org.eclipse.statet.jcommons.lang.Nullable;
-import org.eclipse.statet.jcommons.lang.ObjectUtils;
+import org.eclipse.statet.jcommons.util.Version;
 
 
 @NonNullByDefault
-public class RVersion implements Comparable<RVersion> {
-	
-	private static int parseInt(final String value, final String componentName) {
-		try {
-			return Integer.parseInt(value);
-		}
-		catch (final NumberFormatException e) {
-			throw new IllegalArgumentException(componentName + "= '" + value + "'", e);
-		}
-	}
-	
-	private static void validateInt(final int value, final String componentName) {
-		if (value < 0) {
-			throw new IllegalArgumentException(componentName + "= " + value);
-		}
-	}
-	
-	
-	private final int major;
-	private final int minor;
-	private final int patch;
-	private final String build;
-	
-	private transient @Nullable String versionString;
-	private transient int hash;
+public class RVersion extends Version {
 	
 	
 	public RVersion(final int major, final int minor, final int micro,
 			final @Nullable String qualifier) {
-		this.major= major;
-		this.minor= minor;
-		this.patch= micro;
-		this.build= ObjectUtils.nonNullElse(qualifier, ""); //$NON-NLS-1$
-		validate();
+		super(major, minor, micro, qualifier);
 	}
 	
-	public RVersion(final int major, final int minor, final int path) {
-		this(major, minor, path, null);
+	public RVersion(final int major, final int minor, final int micro) {
+		super(major, minor, micro);
 	}
 	
 	public RVersion(final String version) {
-		int major= 0;
-		int minor= 0;
-		int patch= 0;
-		String build= "";
-		{	final String[] components= version.split("\\.", 4);
-			if (components.length == 0 || components[0].isEmpty()) {
-				throw new IllegalArgumentException("version= '" +  version + "'");
-			}
-			major= parseInt(components[0], "major");
-			if (components.length >= 2) {
-				minor= parseInt(components[1], "minor");
-				if (components.length >= 3) {
-					patch= parseInt(components[2], "patch");
-					if (components.length >= 4) {
-						build= components[3];
-					}
-				}
-			}
-		}
-		
-		this.major= major;
-		this.minor= minor;
-		this.patch= patch;
-		this.build= build;
-		validate();
+		super(version);
 	}
 	
-	private void validate() {
-		validateInt(this.major, "major");
-		validateInt(this.minor, "minor");
-		validateInt(this.patch, "patch");
-		for (int i= 0; i < this.build.length(); i++) {
-			final char c= this.build.charAt(i);
-			if (!Character.isDefined(c) || c == ' ') {
-				throw new IllegalArgumentException("build= " + this.build);
-			}
-		}
-	}
-	
-	
-	public int getMajor() {
-		return this.major;
-	}
-	
-	public int getMinor() {
-		return this.minor;
-	}
-	
-	public int getMicro() {
-		return this.patch;
-	}
-	
-	public String getBuild() {
-		return this.build;
-	}
-	
-	
-	@Override
-	public int hashCode() {
-		int h= this.hash;
-		if (h != 0) {
-			return h;
-		}
-		h= 31 * 17;
-		h= 31 * h + this.major;
-		h= 31 * h + this.minor;
-		h= 31 * h + this.patch;
-		h= 31 * h + this.build.hashCode();
-		return this.hash= h;
-	}
-	
-	@Override
-	public boolean equals(final @Nullable Object object) {
-		if (this == object) {
-			return true;
-		}
-		if (object instanceof RVersion) {
-			final RVersion other= (RVersion) object;
-			return ((this.major == other.major)
-					&& (this.minor == other.minor)
-					&& (this.patch == other.patch)
-					&& this.build.equals(other.build) );
-		}
-		return false;
-	}
-	
-	@Override
-	public int compareTo(final RVersion other) {
-		if (this == other) {
-			return 0;
-		}
-		int result= this.major - other.major;
-		if (result != 0) {
-			return result;
-		}
-		result= this.minor - other.minor;
-		if (result != 0) {
-			return result;
-		}
-		result= this.patch - other.patch;
-		if (result != 0) {
-			return result;
-		}
-		return this.build.compareTo(other.build);
-	}
-	
-	@Override
-	public String toString() {
-		final String s= this.versionString;
-		if (s != null) {
-			return s;
-		}
-		final StringBuilder result= new StringBuilder(20 + this.build.length());
-		result.append(this.major);
-		result.append('.');
-		result.append(this.minor);
-		result.append('.');
-		result.append(this.patch);
-		if (!this.build.isEmpty()) {
-			result.append('.');
-			result.append(this.build);
-		}
-		return this.versionString= result.toString();
-	}
 	
 }