diff --git a/scm-core/src/main/java/sonia/scm/repository/AbstractRepositoryHandler.java b/scm-core/src/main/java/sonia/scm/repository/AbstractRepositoryHandler.java
index 931fbcc39d..5a6b70857b 100644
--- a/scm-core/src/main/java/sonia/scm/repository/AbstractRepositoryHandler.java
+++ b/scm-core/src/main/java/sonia/scm/repository/AbstractRepositoryHandler.java
@@ -186,6 +186,20 @@ public abstract class AbstractRepositoryHandler<C extends SimpleRepositoryConfig
 
   //~--- get methods ----------------------------------------------------------
 
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param repository
+   * @return
+   */
+  @Override
+  public ChangesetViewer getChangesetViewer(Repository repository)
+  {
+    return null;
+  }
+
   /**
    * Method description
    *
diff --git a/scm-core/src/main/java/sonia/scm/repository/Changeset.java b/scm-core/src/main/java/sonia/scm/repository/Changeset.java
new file mode 100644
index 0000000000..576b164432
--- /dev/null
+++ b/scm-core/src/main/java/sonia/scm/repository/Changeset.java
@@ -0,0 +1,323 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.repository;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import sonia.scm.Validateable;
+import sonia.scm.util.Util;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.Serializable;
+
+import java.util.Date;
+import javax.xml.bind.annotation.XmlRootElement;
+import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+import sonia.scm.xml.XmlTimestampDateAdapter;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@XmlRootElement(name="changeset")
+public class Changeset implements Validateable, Cloneable, Serializable
+{
+
+  /** Field description */
+  private static final long serialVersionUID = -8373308448928993039L;
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   */
+  public Changeset() {}
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param id
+   * @param date
+   * @param author
+   */
+  public Changeset(String id, Long date, String author)
+  {
+    this(id, date, author, null);
+  }
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param id
+   * @param date
+   * @param author
+   * @param description
+   */
+  public Changeset(String id, Long date, String author, String description)
+  {
+    this.id = id;
+    this.date = date;
+    this.author = author;
+    this.description = description;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param obj
+   *
+   * @return
+   */
+  @Override
+  public boolean equals(Object obj)
+  {
+    if (obj == null)
+    {
+      return false;
+    }
+
+    if (getClass() != obj.getClass())
+    {
+      return false;
+    }
+
+    final Changeset other = (Changeset) obj;
+
+    if ((this.author == null)
+        ? (other.author != null)
+        : !this.author.equals(other.author))
+    {
+      return false;
+    }
+
+    if ((this.date != other.date)
+        && ((this.date == null) ||!this.date.equals(other.date)))
+    {
+      return false;
+    }
+
+    if ((this.description == null)
+        ? (other.description != null)
+        : !this.description.equals(other.description))
+    {
+      return false;
+    }
+
+    if ((this.id == null)
+        ? (other.id != null)
+        : !this.id.equals(other.id))
+    {
+      return false;
+    }
+
+    return true;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public int hashCode()
+  {
+    int hash = 7;
+
+    hash = 71 * hash + ((this.author != null)
+                        ? this.author.hashCode()
+                        : 0);
+    hash = 71 * hash + ((this.date != null)
+                        ? this.date.hashCode()
+                        : 0);
+    hash = 71 * hash + ((this.description != null)
+                        ? this.description.hashCode()
+                        : 0);
+    hash = 71 * hash + ((this.id != null)
+                        ? this.id.hashCode()
+                        : 0);
+
+    return hash;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public String toString()
+  {
+    StringBuilder out = new StringBuilder("changeset: ");
+
+    out.append(id).append("\n");
+    out.append("author: ").append(author).append("\n");
+
+    if (date != null)
+    {
+      out.append("date: ").append(Util.formatDate(new Date(date))).append("\n");
+    }
+
+    out.append("desc:").append(description).append("\n");
+
+    return out.toString();
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public String getAuthor()
+  {
+    return author;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Long getDate()
+  {
+    return date;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public String getDescription()
+  {
+    return description;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public String getId()
+  {
+    return id;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public boolean isValid()
+  {
+    return Util.isNotEmpty(id) && Util.isNotEmpty(author) && (date != null);
+  }
+
+  //~--- set methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param author
+   */
+  public void setAuthor(String author)
+  {
+    this.author = author;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param date
+   */
+  public void setDate(Long date)
+  {
+    this.date = date;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param description
+   */
+  public void setDescription(String description)
+  {
+    this.description = description;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param id
+   */
+  public void setId(String id)
+  {
+    this.id = id;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** The author of the changeset */
+  private String author;
+
+  /** The date when the changeset was committed */
+  @XmlJavaTypeAdapter(XmlTimestampDateAdapter.class)
+  private Long date;
+
+  /** The text of the changeset description */
+  private String description;
+
+  /** The changeset identification string */
+  private String id;
+}
diff --git a/scm-core/src/main/java/sonia/scm/repository/ChangesetViewer.java b/scm-core/src/main/java/sonia/scm/repository/ChangesetViewer.java
new file mode 100644
index 0000000000..0d5c473f52
--- /dev/null
+++ b/scm-core/src/main/java/sonia/scm/repository/ChangesetViewer.java
@@ -0,0 +1,68 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.repository;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.List;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public interface ChangesetViewer
+{
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param startId
+   * @param max
+   *
+   * @return
+   */
+  public List<Changeset> getChangesets(String startId, int max);
+
+  /**
+   * Method description
+   *
+   *
+   * @param max
+   *
+   * @return
+   */
+  public List<Changeset> getLastChangesets(int max);
+}
diff --git a/scm-core/src/main/java/sonia/scm/repository/RepositoryHandler.java b/scm-core/src/main/java/sonia/scm/repository/RepositoryHandler.java
index 7c04e00a87..4e11e8ac9d 100644
--- a/scm-core/src/main/java/sonia/scm/repository/RepositoryHandler.java
+++ b/scm-core/src/main/java/sonia/scm/repository/RepositoryHandler.java
@@ -43,7 +43,6 @@ import sonia.scm.plugin.ExtensionPoint;
 /**
  *
  * @author Sebastian Sdorra
- *
  */
 @ExtensionPoint
 public interface RepositoryHandler
@@ -60,4 +59,16 @@ public interface RepositoryHandler
    * @return
    */
   public String createResourcePath(Repository repository);
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param repository
+   * @return null if ChangesetViewer is not supported
+   */
+  public ChangesetViewer getChangesetViewer(Repository repository);
 }