diff --git a/lib/Doctrine/Migration.php b/lib/Doctrine/Migration.php
new file mode 100644
index 000000000..dfc6d5938
--- /dev/null
+++ b/lib/Doctrine/Migration.php
@@ -0,0 +1,169 @@
+<?php
+/*
+ *  $Id: Migration.php 1080 2007-02-10 18:17:08Z jwage $
+ *
+ * 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_Migration
+ *
+ * this class represents a database view
+ *
+ * @author      Jonathan H. Wage <jwage@mac.com>
+ * @package     Doctrine
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision: 1080 $
+ */
+class Doctrine_Migration
+{
+    public $changes = array('created_tables'    =>  array(),
+                            'dropped_tables'    =>  array(),
+                            'renamed_tables'    =>  array(),
+                            'added_columns'     =>  array(),
+                            'renamed_columns'   =>  array(),
+                            'changed_columns'   =>  array(),
+                            'removed_columns'   =>  array(),
+                            'added_indexes'     =>  array(),
+                            'removed_indexes'   =>  array());
+    
+    static public function migration($directory, $from, $to)
+    {
+        if ($from === $to OR $from === 0) {
+            throw new Doctrine_Migration_Exception('You specified an invalid migration path. The from and to cannot be the same and from cannot be zero.');
+        }
+        
+        $direction = $from > $to ? 'down':'up';
+        
+        $fromPath = $directory.DIRECTORY_SEPARATOR;
+        $toPath = $directory.DIRECTORY_SEPARATOR;
+        
+        if ($direction === 'up') {
+            for ($i = $from + 1; $i <= $to; $i++) {
+                self::doDirectionStep($directory, $direction, $i);
+            }
+        } else {
+            for ($i = $from; $i > $to; $i--) {
+                self::doDirectionStep($directory, $direction, $i);
+            }
+        }
+    }
+    
+    public static function doDirectionStep($directory, $direction, $num)
+    {
+        $className = 'Migration'.$num;
+        $fileName = $className.'.class.php';
+        $filePath = $directory.DIRECTORY_SEPARATOR.$fileName;
+        
+        if (file_exists($filePath)) {
+            require_once($filePath);
+            
+            if (class_exists($className)) {
+                $migrate = new $className();
+                $migrate->migrate($direction);
+            }
+        }
+    }
+    
+    public function migrate($direction)
+    {
+        if (method_exists($this, $direction)) {
+            $this->$direction();
+
+            $this->processChanges();
+        }
+    }
+    
+    public function processChanges()
+    {
+        foreach ($this->changes as $type => $changes) {
+            $process = new Doctrine_Migration_Process();
+            $funcName = 'process'.Doctrine::classify($type);
+            $process->$funcName($changes); 
+        }
+    }
+    
+    public function addChange($type, array $change = array())
+    {
+        $this->changes[$type][] = $change;
+    }
+    
+    public function createTable($tableName, array $fields = array(), array $options = array())
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('created_tables', $options);
+    }
+    
+    public function dropTable($tableName)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('dropped_tables', $options);
+    }
+    
+    public function renameTable($oldTableName, $newTableName)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('renamed_tables', $options);
+    }
+    
+    public function addColumn($tableName, $columnName, $type, $options = array())
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('added_columns', $options);
+    }
+    
+    public function renameColumn($tableName, $oldColumnName, $newColumnName)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('renamed_columns', $options);
+    }
+    
+    public function changeColumn($tableName, $columnName, $type, array $options = array())
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('changed_columns', $options);
+    }
+    
+    public function removeColumn($tableName, $columnName)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('removed_columns', $options);
+    }
+    
+    public function addIndex($tableName, $indexName, array $options = array())
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('added_indexes', $options);
+    }
+    
+    public function removeIndex($tableName, $indexName)
+    {
+        $options = get_defined_vars();
+        
+        $this->addChange('removed_indexes', $options);
+    }
+}
\ No newline at end of file
diff --git a/lib/Doctrine/Migration/Exception.php b/lib/Doctrine/Migration/Exception.php
new file mode 100644
index 000000000..ea7ccbd5a
--- /dev/null
+++ b/lib/Doctrine/Migration/Exception.php
@@ -0,0 +1,34 @@
+<?php
+/*
+ *  $Id: Exception.php 1080 2007-02-10 18:17:08Z jwage $
+ *
+ * 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_Migration_Exception
+ *
+ * @author      Jonathan H. Wage <jwage@mac.com>
+ * @package     Doctrine
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision: 1080 $
+ */
+class Doctrine_Migration_Exception extends Doctrine_Exception
+{
+}
\ No newline at end of file
diff --git a/lib/Doctrine/Migration/IrreversibleMigration.php b/lib/Doctrine/Migration/IrreversibleMigration.php
new file mode 100644
index 000000000..42f83ae3e
--- /dev/null
+++ b/lib/Doctrine/Migration/IrreversibleMigration.php
@@ -0,0 +1,34 @@
+<?php
+/*
+ *  $Id: IrreversibleMigration.php 1080 2007-02-10 18:17:08Z jwage $
+ *
+ * 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_Migration_IrreversibleMigration
+ *
+ * @author      Jonathan H. Wage <jwage@mac.com>
+ * @package     Doctrine
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision: 1080 $
+ */
+class Doctrine_Migration_IrreversibleMigration extends Doctrine_Migration_Exception
+{
+}
\ No newline at end of file
diff --git a/lib/Doctrine/Migration/Process.php b/lib/Doctrine/Migration/Process.php
new file mode 100644
index 000000000..b6a3d226b
--- /dev/null
+++ b/lib/Doctrine/Migration/Process.php
@@ -0,0 +1,122 @@
+<?php
+/*
+ *  $Id: Process.php 1080 2007-02-10 18:17:08Z jwage $
+ *
+ * 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_Migration_Process
+ *
+ * @author      Jonathan H. Wage <jwage@mac.com>
+ * @package     Doctrine
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision: 1080 $
+ */
+class Doctrine_Migration_Process
+{
+    public function processCreatedTables($tables)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($tables as $table) {
+            $conn->export->createTable($table['tableName'], $table['fields'], $table['options']);
+        }
+    }
+    
+    public function processDroppedTables($tables)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($tables as $table) {
+            $conn->export->dropTable($table['tableName']);
+        }
+    }
+    
+    public function processRenamedTables($tables)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($tables as $table) {
+            $conn->export->alterTable($table['oldTableName'], array('name' => $table['newTableName']), true);
+        }
+    }
+    
+    public function processAddedColumns($columns)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($columns as $column) {
+            $options = array();
+            $options = $column['options'];
+            $options['type'] = $column['type'];
+            
+            $conn->export->alterTable($column['tableName'], array('add' => array($column['columnName'] => $options)), true);
+        }
+    }
+    
+    public function processRenamedColumns($columns)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($columns as $column) {
+            $conn->export->alterTable($column['tableName'], array('rename' => array($column['oldColumnName'] => array('name' => $column['newColumnName']))), true);
+        }
+    }
+    
+    public function processChangedColumns($columns)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($columns as $column) {
+            $options = array();
+            $options = $column['options'];
+            $options['type'] = $column['type'];
+            
+            $conn->export->alterTable($column['tableName'], array('change' => array($column['oldColumnName'] => array('definition' => $options))), true);
+        }  
+    }
+    
+    public function processRemovedColumns($columns)
+    {
+        $conn = Doctrine_Manager::connection();
+
+        foreach ($columns as $column) {
+            $conn->export->alterTable($column['tableName'], array('remove' => array($column['columnName'] => array())));
+        }
+    }
+    
+    public function processAddedIndexes($indexes)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($indexes as $index) {
+            $conn->export->createIndex($index['tableName'], $index['indexName'], $index['definition']);
+        }
+    }
+    
+    public function processRemovedIndexes($indexes)
+    {
+        $conn = Doctrine_Manager::connection();
+        
+        foreach ($indexes as $index) {
+            $conn->export->dropIndex($index['tableName'], $index['indexName']);
+        } 
+    }
+}
\ No newline at end of file