--- admin/dbtransfer/dbdata.xsd
+++ admin/dbtransfer/dbdata.xsd
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8" ?> 
+<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"> 
+    <xs:element name="moodle_database" type="databaseType" /> 
+    <xs:complexType name="databaseType"> 
+        <xs:sequence> 
+            <xs:element maxOccurs="unbounded" name="table" type="tableType" /> 
+        </xs:sequence> 
+        <xs:attribute name="version" type="xs:positiveInteger" use="required" /> 
+        <xs:attribute name="timestamp" type="xs:dateTime" use="required" /> 
+        <xs:attribute name="comment" type="xs:string" /> 
+    </xs:complexType> 
+    <xs:complexType name="tableType"> 
+        <xs:sequence> 
+            <xs:element maxOccurs="unbounded" name="record" type="recordType" /> 
+        </xs:sequence> 
+        <xs:attribute name="name" type="xs:NCName" use="required" /> 
+        <xs:attribute name="schemaHash" type="xs:string" use="required" /> 
+    </xs:complexType> 
+    <xs:complexType name="recordType"> 
+        <xs:sequence> 
+            <xs:element maxOccurs="unbounded" name="field" type="fieldType" /> 
+        </xs:sequence> 
+    </xs:complexType> 
+    <xs:complexType name="fieldType"> 
+        <xs:simpleContent> 
+            <xs:extension base="xs:string"> 
+                <xs:attribute name="name" type="xs:string" use="required" /> 
+                <xs:attribute default="content" name="value" use="optional"> 
+                    <xs:simpleType> 
+                    <xs:restriction base="xs:string"> 
+                        <xs:enumeration value="content" /> 
+                        <xs:enumeration value="null" /> 
+                    </xs:restriction> 
+                    </xs:simpleType> 
+                </xs:attribute> 
+            </xs:extension> 
+        </xs:simpleContent> 
+    </xs:complexType> 
+</xs:schema>