164 better clarification and description of development and released …

…versions of the fmi ls bus on the fmi ls bus landing page (#168)

* Save work

* Reworking of fmi-ls-bus landing page and adding of roadmap stuff

* Remove arrow description within detailed roadmap

* Saving work

* Adjust roadmap depending on review comments

* Fixed roadmap

* Add "tests" folder to Repository Structure within landing page

* Adjust position of "Version 1.0.0" within roadmap

* Regenerate roadmap.svg

---------

Co-authored-by: Benedikt Menne <[email protected]>

README.md

@@ -13,14 +13,26 @@ officially endorsed by the Modelica Association or other involved
 organisations prior to official adoption.
 
 The [FMI 3.0 Layered Standard Network Communication][spec] is currently
-maintained on [GitHub][githubspec] and is published [here][spec]. It is
-based on the [FMI][] standard.
+maintained on [GitHub][githubspec] and is based on the [FMI][] standard.
+The current state of development is published [here][spec] and
+contains all bus types that are currently in development or are already final.
+[Official releases][releases] are directly published via GitHub.
+
+## Roadmap
+Different abstraction layers and types of buses are developed in different versions that build on each other.
+Corresponding [milestones][milestones] and a detailed roadmap have
+been defined for this purpose.
+The following graphic provides an overview of the planned sequence of supported bus systems:
+
+![roadmap of fmi-ls-bus](roadmap_overview.svg)
+
+A detailed roadmap showing completed, current and future work can be accessed [here][roadmap].
 
 ## Repository Structure
 - `docs` -- Sources of the specification document
 - `headers` -- Header files of the C-API
 - `schema` -- XSD schema for this FMI Layered
-Standard
+- `tests` -- Contains unit tests for the provided header files
 
 ## Getting Started
 To help you get started, we provide introductory chapters.
@@ -36,19 +48,27 @@ See also the overview pages for the demos, categorized by the different supporte
 * [CAN, CAN FD and CAN XL Demo Overview] 
 
 ## FMI LS Bus Implementers' Guide
-The [FMI LS Bus Implementers' Guide] is a free resource intended to give non-normative recommendations and guidance to implementers of the Functional Mock-up Interface layered standard Network Communication (FMI-LS-BUS).
+The [FMI LS Bus Implementers' Guide] is a free resource intended to give non-normative recommendations and guidance to implementers of the Functional Mock-up Interface Layered Standard Network Communication (FMI-LS-BUS).
 
 ## Copyright and License
 Code and documentation copyright (C) 2008-2011 the MODELISAR consortium and 2012-2024 the Modelica Association Project FMI.
 Code released under the [2-Clause BSD License].
 Docs released under [Attribution-ShareAlike 4.0 International].
 
+## Other FMI Layered Standards
+If you are interested in the FMI Layered Standard for Network Communication, the [fmi-ls-xcp] could also be relevant to you.
+The [fmi-ls-xcp] specifies an FMI extension for using the XCP protocol and A2L variable description within FMUs.
+
 [FMI]: https://fmi-standard.org/
+[fmi-ls-xcp]: https://github.com/modelica/fmi-ls-xcp
 [Demo FMUs]: https://github.com/modelica/fmi-guides/tree/main/ls-bus-guide/demos
 [2-Clause BSD License]: https://opensource.org/licenses/BSD-2-Clause
 [Attribution-ShareAlike 4.0 International]: https://creativecommons.org/licenses/by-sa/4.0/
 [githubspec]: docs/index.adoc
+[roadmap]: https://raw.githubusercontent.com/bmenne-dspace/fmi-ls-bus/main/roadmap.svg
 [spec]: https://modelica.github.io/fmi-ls-bus/main/
+[milestones]: https://github.com/modelica/fmi-ls-bus/milestones?direction=asc&sort=title&state=open
+[releases]: https://github.com/modelica/fmi-ls-bus/releases
 [FMI LS Bus Implementers' Guide]: https://modelica.github.io/fmi-guides/main/ls-bus-guide/
 [Getting started with CAN, CAN FD and CAN XL]: https://modelica.github.io/fmi-guides/main/ls-bus-guide/#low-cut-can-getting-started-with-can
 [CAN, CAN FD and CAN XL Demo Overview]: https://modelica.github.io/fmi-guides/main/ls-bus-guide/#low-cut-can-demos