Update README.md

Author: pmai

README.md

@@ -8,19 +8,21 @@ information exchange.  Note that this specification is actively
 being worked on, and thus subject to change without notice.
 
 The [specification][spec] is maintained on [GitHub][github] and is
-published [here][spec]. It is based on the [SSP 1.0][SSP10] standard.
+published [here][spec]. It is based on the [SSP 2.0][SSP20] standard,
+but usable with both SSP 1.0 and SSP 2.0.
 
 Additional guides are provided [here][guides] and example files are
 provided [here][examples].
 
 ## Copyright and License
 
-XML schemas and documentation copyright (C) 2019 - 2024 the Modelica Association Project SSP.
+XML schemas and documentation copyright (C) 2019 - 2025 the Modelica Association Project SSP.
 XML schemas released under the [2-Clause BSD License][BSD-2].
 Documentation released under [Attribution-ShareAlike 4.0 International][CC-BY-SA-4].
 
 [SSP]: https://ssp-standard.org/
-[SSP10]: https://ssp-standard.org/publications/SSP10/SystemStructureAndParameterization10.pdf
+[SSP10]: https://ssp-standard.org/publications/SSP101/SystemStructureAndParameterization101.pdf
+[SSP20]: https://ssp-standard.org/docs/2.0/
 [github]: specification/index.adoc
 [spec]: https://modelica.github.io/ssp-ls-traceability/master/
 [guides]: https://github.com/PMSFIT/SSPTraceabilityGuides/