Update README.md

update links, add link to Top Level Eclipse Digital Twin Project
add V2.0 and V3.0 to distinguish

README.md

@@ -35,17 +35,17 @@ Asset Administration Shell.
 https://github.com/admin-shell-io/aasx-package-explorer/raw/master/screenshot.png
 )
 
-To help you familiarize with the concept of Asset Administration Shell 
-we provide the screencasts (both in English and German) at: 
+To help you familiarize with the concept of Asset Administration Shell and editing an Asset Administration Shell with the AASX Package Explorer
+we provide screencasts (both in English and German) for V2.0 at: 
 https://admin-shell-io.com/screencasts/.
 
-For further information about the Asset Administration Shell, see the 
-publication [Details of the Asset Administration Shell](
-https://www.plattform-i40.de/IP/Redaktion/EN/Standardartikel/specification-administrationshell.html
-) by Plattform Industrie 4.0.
+For V3.0 (including changes to V2.0) please have a look at the tutorials for the Specifications itself at the [Youtube Channel Industrial Digital Twin](https://www.youtube.com/playlist?list=PLCO0zeX96Ia1hsToD9lRPDMI4P-kbt_CT) 
+
+The basis for the implementatzion are the [Specifications of the Asset Administration Shell](https://industrialdigitaltwin.org/en/content-hub/aasspecifications
+) by [IDTA]A(https://industrialdigitaltwin.org).
 
 We provide a couple of sample admin shells (packaged as .aasx) for you to 
-test and play with the software at:
+test and play with the software at (V2.0):
 http://www.admin-shell-io.com/samples/
 
 ## Installation
@@ -101,6 +101,9 @@ AASX Package Explorer, in contrast, is a tool with graphical user interface
 meant for experimenting and demonstrating the potential of asset administration
 shells targeting tech-savvy and less technically-inclined users alike.
 
+In 2021 the [Eclipse Digital Twin Top Level Project](https://projects.eclipse.org/projects/dt) 
+was created. See sub-projects for more projects featuring digital twins and the Asset Administration Shell.
+
 The AASX Package Explorer also includes an internal REST server and OPC UA
 server for the loaded .AASX. Based on this a separate AASX Server is
 available (https://github.com/admin-shell-io/aasx-server) which can host