diff --git a/SDT/schema2.0/docs/SDT_Components.md b/SDT/schema2.0/docs/SDT_Components.md
index 7c99878b20b8bdde0b199fe631135d1240db069d..2bb770944d16a8e2d67f239af67c2c8e3726a9af 100644
--- a/SDT/schema2.0/docs/SDT_Components.md
+++ b/SDT/schema2.0/docs/SDT_Components.md
@@ -2,6 +2,11 @@
 
 In this document an overview about the SDT 2.0 ødefinitions and component hierarchy is given.
 
+[Domain](#Domain)  
+[RootDevice](#RootDevice)  
+[Device](#Device)  
+[DeviceInfo](#DeviceInfo)
+
 ## SDT Overview
 The followng UML diagram presents an overview about the SDT components.
 
@@ -14,15 +19,23 @@ The syntax used in the diagram to model an XML Schema Definition (XSD) as an UML
 
 
 ## Components
--TBD
-
----
 
+<a name="Domain"></a>
 ### Domain
 The *Domain* is the top-level component that defines all modules and devices of a domain. A *Domain* can import definitions of other domains.
 
+A *Domain* can define *ModuleClasses* or *RootDevices* only, or may choose to provide both.
+
 ![](images/Domain.png)
 
+#### Attributes
+- **id** : The identifier for that *Domain*. Required.
+
+#### Elements
+- **Imports** : XML import/include of other XML files. Optional.
+- **Modules** : A list of *Module* components that are global to the whole domain. Optional.
+- **RootDevices** : a List *RootDevice* components. Optional.
+
 #### Example
 
 	<Domain xmlns:xi="http://www.w3.org/2001/XInclude"
@@ -32,23 +45,127 @@ The *Domain* is the top-level component that defines all modules and devices of
       	  <xi:include href="./dal-core.xml" parse="xml" />
     	</Imports>
     	<Modules>
-    		<!-- Modules go here -->
+    		<!-- List of Domain global Modules go here -->
     	</Modules>
     	<RootDevices>
-    		<!-- RootDevices go here -->
+    		<!-- List of RootDevices go here -->
 		</RootDevices>
 	</Domain>
 
 
 ---
 
+<a name="RootDevice"/></a>
 ### RootDevice
-#### DeviceInfo
+A *RootDevice* is the description of a (physical) device that may contain optional sub-devices. It represents the idea an appliance that is addressable on a Home Area Network where one or more sub-*Devices* provide certain functionalities. 
+
+An example is a connected power-strip where each of the sockets can be switched on and off individually. The power-strip itself can provide functions such as "all sockets off" and "overall power consumption".
+
+If the *RootDevice* includes sub-*Devices* then each sub-device may be of the same type or of different types. The functionality (*Actions*) of the *RootDevice* may be different from the functionality of its sub-*Devices*.
+
+If the *RootDevice* does not include sub-devices then the *RootDevice* is the actual adressable device that provides all the functionality of the connected appliance.
+
+*RootDevices* may define their own *ModuleClasses* or refer to predefined ModulesClasses of its or another *Domain*.
+
+![](images/RootDevice.png)
+
+#### Attributes
+- **id** : The identifier for that *RootDevice*. Required.
+
+#### Elements
+
+- **Doc** : Documentation for the *RootDevice*. Optional.
+- **Modules** : A list of *Module* components that are local to the *RootDevice*. Optional.
+- **DeviceInfo** : Further meta-data about the *RootDevice*. Optional.
+- **Devices** : A list *Device* components. Optional.
+
+#### Example
+
+	<RootDevice id="aRootDevice">
+		<Doc>Some documentation</Doc>
+		<Modules>
+			<!-- List of Modules local to the RootDevice go here-->
+		</Modules>
+		<DeviceInfo>
+			<!-- The DeviceInfos for the RootDevice goes here-->
+		</DeviceInfo>
+		<Devices>
+			<!-- List of Sub-Devices of the RootDevice go here-->
+		</Devices>
+	</RootDevice>
+
+---
 
 ### Device
+*Devices* are optional components of a *RootDevice*. They represent physical sub-devices inside another device (the *RootDevice*).
+
+*Devices* may define their own *ModuleClasses* or refer to predefined ModulesClasses of its or another *Domain*.
+
+![](images/Device.png)
+
+#### Attributes
+- **id** : The identifier for that *Device*. Required.
+
+#### Elements
+- **Doc** : Documentation for the *Device*. Optional.
+- **Modules** : A list of *Module* components that are local to the *RootDevice*. Optional.
+- **DeviceInfo** : A list *Device* components. Optional.
+
+#### Example
+
+	<Device id="aDevice">
+		<Doc>Some documentation</Doc>
+		<Modules>
+			<!-- Modules local to the Device go here-->
+		</Modules>
+		<DeviceInfo>
+			<!-- The DeviceInfo for the Device goes here-->
+		</DeviceInfo>
+	</RootDevice>
+
+---
 
 ### Module, ModuleClass, ModuleDef
 
+
+![](images/Domain.png)
+
+#### Attributes
+#### Sub-Components
+#### Example
+
+---
+
+<a name="DeviceInfo"/></a>
+### DeviceInfo
+The *DeviceInfo* is an element of *RootDevice* or *Device* where a device vendor can provide metadata for a device that may be presented to an end-user.
+
+![](images/DeviceInfo.png)
+
+#### Attributes
+None.
+
+#### Elements
+- **Name** : Vendor-specific name of a device. Required.
+- **Vendor** : Name of the vendor for the device. Required.
+- **FirmwareVersion** : Current version number of the firmware or other version information. Optional.
+- **VendorURL** : A URL that points to further information for that device. This might be the product page on the web or an URL to the device manual. Optional.
+- **SerialNumber** : The serial number or serial string. Optional.
+
+#### Example
+	
+	<DeviceInfo>
+		<Name>SomeDeviceName</Name>
+		<Vendor>ACME</Vendor>
+		<FirmwareVersion>1.0</FirmwareVersion>
+		<VendorURL>http://www.example.com/</VendorURL>
+		<SerialNumber>1234.5</SerialNumber>
+	</DeviceInfo>
+
+---
+
+---
+
 ### Action
 
 ### Data
@@ -59,3 +176,14 @@ The *Domain* is the top-level component that defines all modules and devices of
 
 
 
+
+
+
+
+
+# DOC TBD
+Explain. Describe content elements
+
+
+
+
diff --git a/SDT/schema2.0/docs/SDT_UML.uxf b/SDT/schema2.0/docs/SDT_UML.uxf
index ede0c4dd6547334ae17a654472a0c88a645ac31e..9a0d8c474e4936c2ef340a460889fa95ee3a5eaf 100644
--- a/SDT/schema2.0/docs/SDT_UML.uxf
+++ b/SDT/schema2.0/docs/SDT_UML.uxf
@@ -4,12 +4,12 @@
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>270</x>
-      <y>70</y>
+      <x>330</x>
+      <y>120</y>
       <w>150</w>
       <h>130</h>
     </coordinates>
-    <panel_attributes>ModuleDef
+    <panel_attributes>ModuleClass
 --
 *@ name : text*
 /- extends: Extends/
@@ -17,14 +17,15 @@
 /- Actions : Actions/
 /- Data : Data/
 /- Events : Events/
+fg=blue
 </panel_attributes>
     <additional_attributes/>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>520</x>
-      <y>160</y>
+      <x>580</x>
+      <y>190</y>
       <w>140</w>
       <h>100</h>
     </coordinates>
@@ -40,21 +41,21 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>410</x>
-      <y>70</y>
+      <x>470</x>
+      <y>100</y>
       <w>130</w>
-      <h>70</h>
+      <h>90</h>
     </coordinates>
     <panel_attributes>lt=&lt;-
 m1=0,1
 </panel_attributes>
-    <additional_attributes>110.0;10.0;40.0;10.0;40.0;50.0;10.0;50.0</additional_attributes>
+    <additional_attributes>110.0;10.0;40.0;10.0;40.0;70.0;10.0;70.0</additional_attributes>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>740</x>
-      <y>230</y>
+      <x>800</x>
+      <y>260</y>
       <w>160</w>
       <h>80</h>
     </coordinates>
@@ -63,14 +64,14 @@ m1=0,1
 *@ name ; text*
 *@ type : DataType*
 /- Doc : Doc/
-</panel_attributes>
+fg=blue</panel_attributes>
     <additional_attributes/>
   </element>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>650</x>
-      <y>230</y>
+      <x>710</x>
+      <y>260</y>
       <w>110</w>
       <h>40</h>
     </coordinates>
@@ -81,8 +82,8 @@ m1=0..*</panel_attributes>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>0</x>
-      <y>200</y>
+      <x>60</x>
+      <y>230</y>
       <w>200</w>
       <h>100</h>
     </coordinates>
@@ -98,21 +99,20 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>190</x>
-      <y>250</y>
+      <x>250</x>
+      <y>120</y>
       <w>100</w>
-      <h>50</h>
+      <h>200</h>
     </coordinates>
     <panel_attributes>lt=&lt;-
-m1=0..*
-</panel_attributes>
-    <additional_attributes>80.0;20.0;10.0;20.0</additional_attributes>
+m1= 0..*</panel_attributes>
+    <additional_attributes>80.0;10.0;30.0;10.0;30.0;180.0;10.0;180.0</additional_attributes>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>270</x>
-      <y>570</y>
+      <x>330</x>
+      <y>600</y>
       <w>190</w>
       <h>100</h>
     </coordinates>
@@ -128,8 +128,8 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>180</x>
-      <y>270</y>
+      <x>240</x>
+      <y>300</y>
       <w>50</w>
       <h>250</h>
     </coordinates>
@@ -141,8 +141,8 @@ m1=0..*
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>530</x>
-      <y>580</y>
+      <x>590</x>
+      <y>610</y>
       <w>180</w>
       <h>130</h>
     </coordinates>
@@ -160,8 +160,8 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>450</x>
-      <y>580</y>
+      <x>510</x>
+      <y>610</y>
       <w>100</w>
       <h>90</h>
     </coordinates>
@@ -172,8 +172,8 @@ m1= 0,1</panel_attributes>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>740</x>
-      <y>0</y>
+      <x>800</x>
+      <y>30</y>
       <w>160</w>
       <h>210</h>
     </coordinates>
@@ -195,21 +195,22 @@ blob</panel_attributes>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>790</x>
-      <y>620</y>
+      <x>850</x>
+      <y>650</y>
       <w>110</w>
       <h>50</h>
     </coordinates>
     <panel_attributes>Doc
 --
-- ...</panel_attributes>
+- ...
+fg=blue</panel_attributes>
     <additional_attributes/>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>520</x>
-      <y>60</y>
+      <x>580</x>
+      <y>90</y>
       <w>130</w>
       <h>80</h>
     </coordinates>
@@ -224,21 +225,21 @@ Extends
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>410</x>
-      <y>140</y>
+      <x>470</x>
+      <y>180</y>
       <w>130</w>
-      <h>60</h>
+      <h>50</h>
     </coordinates>
     <panel_attributes>lt=&lt;-
 m1=0..*
 </panel_attributes>
-    <additional_attributes>110.0;30.0;80.0;30.0;80.0;10.0;10.0;10.0</additional_attributes>
+    <additional_attributes>110.0;20.0;10.0;20.0</additional_attributes>
   </element>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>650</x>
-      <y>10</y>
+      <x>710</x>
+      <y>40</y>
       <w>110</w>
       <h>220</h>
     </coordinates>
@@ -250,8 +251,8 @@ m1=0,1
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>720</x>
-      <y>610</y>
+      <x>780</x>
+      <y>640</y>
       <w>90</w>
       <h>50</h>
     </coordinates>
@@ -263,8 +264,8 @@ m1=0..*
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>890</x>
-      <y>80</y>
+      <x>950</x>
+      <y>110</y>
       <w>50</w>
       <h>220</h>
     </coordinates>
@@ -276,8 +277,8 @@ m1= 1
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>520</x>
-      <y>310</y>
+      <x>580</x>
+      <y>340</y>
       <w>170</w>
       <h>50</h>
     </coordinates>
@@ -290,21 +291,21 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>410</x>
-      <y>160</y>
+      <x>470</x>
+      <y>210</y>
       <w>130</w>
-      <h>190</h>
+      <h>170</h>
     </coordinates>
     <panel_attributes>lt=&lt;-
 m1=0..*
 </panel_attributes>
-    <additional_attributes>110.0;160.0;50.0;160.0;50.0;10.0;10.0;10.0</additional_attributes>
+    <additional_attributes>110.0;140.0;50.0;140.0;50.0;10.0;10.0;10.0</additional_attributes>
   </element>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>680</x>
-      <y>320</y>
+      <x>740</x>
+      <y>350</y>
       <w>80</w>
       <h>50</h>
     </coordinates>
@@ -316,8 +317,8 @@ m1=0..*
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>740</x>
-      <y>330</y>
+      <x>800</x>
+      <y>360</y>
       <w>160</w>
       <h>130</h>
     </coordinates>
@@ -329,14 +330,15 @@ m1=0..*
 /@ readable : boolean/
 /@ eventable : boolean/
 /- Doc : Doc/
+fg=blue
 </panel_attributes>
     <additional_attributes/>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>530</x>
-      <y>490</y>
+      <x>590</x>
+      <y>520</y>
       <w>160</w>
       <h>80</h>
     </coordinates>
@@ -351,21 +353,21 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>410</x>
-      <y>170</y>
+      <x>470</x>
+      <y>220</y>
       <w>140</w>
-      <h>360</h>
+      <h>340</h>
     </coordinates>
     <panel_attributes>lt=&lt;-
 m1=0..*
 </panel_attributes>
-    <additional_attributes>120.0;330.0;30.0;330.0;30.0;10.0;10.0;10.0</additional_attributes>
+    <additional_attributes>120.0;310.0;30.0;310.0;30.0;10.0;10.0;10.0</additional_attributes>
   </element>
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>270</x>
-      <y>520</y>
+      <x>330</x>
+      <y>550</y>
       <w>120</w>
       <h>30</h>
     </coordinates>
@@ -373,36 +375,11 @@ m1=0..*
 fg=blue</panel_attributes>
     <additional_attributes/>
   </element>
-  <element>
-    <id>UMLClass</id>
-    <coordinates>
-      <x>270</x>
-      <y>260</y>
-      <w>120</w>
-      <h>30</h>
-    </coordinates>
-    <panel_attributes>ModuleClass
-fg=blue</panel_attributes>
-    <additional_attributes/>
-  </element>
-  <element>
-    <id>Relation</id>
-    <coordinates>
-      <x>320</x>
-      <y>190</y>
-      <w>100</w>
-      <h>90</h>
-    </coordinates>
-    <panel_attributes>lt=&lt;&lt;&lt;.
-&lt;&lt;extends&gt;&gt;
-</panel_attributes>
-    <additional_attributes>10.0;10.0;10.0;70.0</additional_attributes>
-  </element>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>380</x>
-      <y>520</y>
+      <x>440</x>
+      <y>550</y>
       <w>110</w>
       <h>130</h>
     </coordinates>
@@ -414,20 +391,20 @@ m1=0..*
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>320</x>
-      <y>280</y>
+      <x>380</x>
+      <y>240</y>
       <w>100</w>
-      <h>260</h>
+      <h>330</h>
     </coordinates>
     <panel_attributes>lt=&lt;&lt;&lt;.
 &lt;&lt;extends&gt;&gt;</panel_attributes>
-    <additional_attributes>10.0;10.0;10.0;240.0</additional_attributes>
+    <additional_attributes>10.0;10.0;10.0;310.0</additional_attributes>
   </element>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>590</x>
-      <y>350</y>
+      <x>650</x>
+      <y>380</y>
       <w>130</w>
       <h>210</h>
     </coordinates>
@@ -439,8 +416,8 @@ m1=0..*
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>890</x>
-      <y>10</y>
+      <x>950</x>
+      <y>40</y>
       <w>70</w>
       <h>390</h>
     </coordinates>
@@ -452,8 +429,8 @@ m1=1
   <element>
     <id>UMLClass</id>
     <coordinates>
-      <x>10</x>
-      <y>500</y>
+      <x>70</x>
+      <y>530</y>
       <w>190</w>
       <h>110</h>
     </coordinates>
@@ -470,8 +447,8 @@ fg=blue</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>190</x>
-      <y>560</y>
+      <x>250</x>
+      <y>590</y>
       <w>100</w>
       <h>50</h>
     </coordinates>
@@ -483,8 +460,8 @@ m1=0..*
   <element>
     <id>UMLNote</id>
     <coordinates>
-      <x>0</x>
-      <y>0</y>
+      <x>60</x>
+      <y>30</y>
       <w>200</w>
       <h>130</h>
     </coordinates>
@@ -504,8 +481,8 @@ Subclassing</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>100</x>
-      <y>60</y>
+      <x>160</x>
+      <y>90</y>
       <w>100</w>
       <h>40</h>
     </coordinates>
@@ -518,8 +495,8 @@ m1=0..*
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>100</x>
-      <y>90</y>
+      <x>160</x>
+      <y>120</y>
       <w>110</w>
       <h>40</h>
     </coordinates>
@@ -531,8 +508,8 @@ fontsize=10</panel_attributes>
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>190</x>
-      <y>520</y>
+      <x>250</x>
+      <y>550</y>
       <w>100</w>
       <h>60</h>
     </coordinates>
@@ -544,8 +521,8 @@ m1=0..*
   <element>
     <id>Relation</id>
     <coordinates>
-      <x>190</x>
-      <y>580</y>
+      <x>250</x>
+      <y>610</y>
       <w>360</w>
       <h>130</h>
     </coordinates>