diff --git a/doctrine-mapping.xsd b/doctrine-mapping.xsd
index e74010a8e..9b6b7c629 100644
--- a/doctrine-mapping.xsd
+++ b/doctrine-mapping.xsd
@@ -124,6 +124,8 @@
     <xs:attribute name="nullable" type="xs:boolean" default="false" />
     <xs:attribute name="version" type="xs:boolean" />
     <xs:attribute name="column-definition" type="xs:string" />
+    <xs:attribute name="precision" type="xs:integer" use="optional" />
+    <xs:attribute name="scale" type="xs:integer" use="optional" />
   </xs:complexType>
   
   <xs:complexType name="discriminator-column">
@@ -135,7 +137,7 @@
   
   <xs:complexType name="unique-constraint">
     <xs:attribute name="name" type="xs:NMTOKEN" use="optional"/>
-    <xs:attribute name="columns" type="xs:NMTOKENS" use="required"/>
+    <xs:attribute name="columns" type="xs:string" use="required"/>
   </xs:complexType>
   
   <xs:complexType name="unique-constraints">
diff --git a/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
index d41e01eed..5c2edff5b 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/XmlMappingDriverTest.php
@@ -32,6 +32,19 @@ class XmlMappingDriverTest extends AbstractMappingDriverTest
         $this->assertEquals(3, count($class->discriminatorMap));
         $this->assertEquals($expectedMap, $class->discriminatorMap);
     }
+
+    public function testValidateXmlSchema()
+    {
+        $xsdSchemaFile = __DIR__ . "/../../../../../doctrine-mapping.xsd";
+
+        $dom = new \DOMDocument('UTF-8');
+        $dom->load(__DIR__ . "/xml/Doctrine.Tests.ORM.Mapping.CTI.dcm.xml");
+        $this->assertTrue($dom->schemaValidate($xsdSchemaFile));
+        
+        $dom = new \DOMDocument('UTF-8');
+        $dom->load(__DIR__ . "/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml");
+        $this->assertTrue($dom->schemaValidate($xsdSchemaFile));
+    }
 }
 
 class CTI
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.CTI.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.CTI.dcm.xml
index 472c16558..e6459afae 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.CTI.dcm.xml
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.CTI.dcm.xml
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
-              xsi="http://www.w3.org/2001/XMLSchema-instance"
-              schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
     <entity name="Doctrine\Tests\ORM\Mapping\CTI">
-        <discriminator-column name="discr" type="string" length=""/>
+        <discriminator-column name="discr" type="string" length="60"/>
         <discriminator-map>
             <discriminator-mapping value="foo" class="CTIFoo"/>
             <discriminator-mapping value="bar" class="CTIBar"/>
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
index 793be0f06..be905e470 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
@@ -18,8 +18,8 @@
         </lifecycle-callbacks>
 
         <id name="id" type="integer" column="id">
-            <sequence-generator sequence-name="tablename_seq" allocation-size="100" initial-value="1" />
             <generator strategy="AUTO"/>
+            <sequence-generator sequence-name="tablename_seq" allocation-size="100" initial-value="1" />
         </id>
         
         <field name="name" column="name" type="string" length="50" nullable="true" unique="true" />
@@ -31,12 +31,12 @@
         </one-to-one>
         
         <one-to-many field="phonenumbers" target-entity="Phonenumber" mapped-by="user">
-            <order-by>
-                <order-by-field name="number" direction="ASC" />
-            </order-by>
             <cascade>
                 <cascade-persist/>
             </cascade>
+            <order-by>
+                <order-by-field name="number" direction="ASC" />
+            </order-by>
         </one-to-many>
         
         <many-to-many field="groups" target-entity="Group">