Update README.md

README.md

-## D-SI 2021
+# Publication note
 
-D-SI 2021 will be an update of the D-SI XML format for release in 2021.
+## D-SI XML implementation version 2.0.0
 
-We are collectiong suggestions for changes. 
+[>> Go To WIKI](wiki/d-si-online-guide.md) to find documentation, examples and good practise
 
-**Curent list of suggestions:**
-* Make D-SI XML scheme more similar to DCC XML scheme
-* Add upper-level elements to enclose uncertainty types
-* Change value data types from xsd:double to xsd:decimal
-* Improvement of licence (Issue https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/19)
-* Rename real in list (Issue https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/21)
-* Content of distribution elements (https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/14)
+[>> D-SI Datamodel](https://doi.org/10.5281/zenodo.3816685)
+
+**Machine-readable versions of the underlying XSD files are online at**
+
+* D-SI XSD version 2.0.0 @ [https://www.ptb.de/si/v2.0.0/SI_Format.xsd](https://www.ptb.de/si/v2.0.0/SI_Format.xsd)
+
+* Latest D-SI XSD version @ [https://www.ptb.de/si/SI_Format.xsd](https://www.ptb.de/si/SI_Format.xsd)
+
+* XSD for D-SI example files [https://www.ptb.de/si/v2.0.0/examples/SI_Format_TestData.xsd](https://www.ptb.de/si/v2.0.0/examples/SI_Format_TestData.xsd)