Improve and extend About page

Author: dalito

docs/docs_usage/about.md

@@ -1,31 +1,43 @@
 # About Voc4Cat
 
-Voc4Cat is an example for applying *open data, open code, and open infrastructure (O3)* to create community-curated scientific resources that can outlast funding.
-For more information on the *O3* idea, see [C. Hoyt and B. Gyori, 2024](https://doi.org/10.1038/s41597-024-03406-w).
+## Community
 
-```{todo} Add contributors, maintainers, citation, licence etc. - review which parts from about-guidelines and main project README.md should move here.
-```
+The vocabulary and tooling are a community effort. See the project contributors listing and the Zenodo record for citation metadata and contributor details:
 
-**FUNDING**
+- [Project contributors](https://github.com/nfdi4cat/voc4cat/graphs/contributors) on GitHub
+- [Zenodo record](https://doi.org/10.5281/zenodo.8313340) (includes authors and contributor metadata)
 
-<img src="./media/dfg.png" alt="DFG logo" />
+Maintenance and editorial decisions are handled by the [Voc4Cat curators](https://github.com/orgs/nfdi4cat/teams/voc4cat-curators) group.
+For maintainer contact or editorial queries, please open an issue in the [Voc4Cat repository](https://github.com/nfdi4cat/voc4cat/issues).
 
-This work was funded by the German Research Foundation (DFG) through the project "[NFDI4Cat](https://nfdi4cat.org/) - NFDI for Catalysis-Related
-Sciences" (DFG project no. [441926934](https://gepris.dfg.de/gepris/projekt/441926934)),
-within the National Research Data Infrastructure ([NFDI](https://www.nfdi.de/)) programme of the Joint Science Conference (GWK).
+## Citing Voc4Cat
+
+If you use Voc4Cat in publications or software, please cite the deposited vocabulary either using the version-indepandant general citation
+
+> Voc4Cat – A SKOS Vocabulary for the Catalysis Disciplines. nfdi4cat/voc4cat. Zenodo. DOI: 10.5281/zenodo.8313340
+
+or (preferred) the exact version that you used, e.g.
+
+> Linke, D., Moustakas, N., Doerr, M., Schumann, J., Götte, M., Borgelt, H., Nentwich, M., Terboven, C., & Flecken, F. (2025). Voc4Cat – A SKOS Vocabulary for the Catalysis Disciplines, Release 2025-10-14 (v2025-10-14). Zenodo. https://doi.org/10.5281/zenodo.17351357
 
-**CONTACT for NFDI4Cat**
+For the most recent citation, visit the [general Zenodo page](https://doi.org/10.5281/zenodo.8313340).
 
-<img src="./media/dechema.png" alt="DECHEMA e.V. logo" />
+## Guiding principles
 
-DECHEMA Gesellschaft für Chemische Technik und Biotechnologie e.V.
-Theodor-Heuss-Allee 25
-D–60486 Frankfurt am Main
+Voc4Cat follows a set of guiding principles – openness of data, openness of code, and open infrastructure – to ensure the vocabulary remains discoverable, reusable and maintainable over time.
 
-Phone: 0049-69-7564-0
-Fax: 0049-69-7564-117
+A recent paper refers to these underlying ideas as "O3" (open data, open code, open infrastructure). For more see [C. Hoyt and B. Gyori, 2024](https://doi.org/10.1038/s41597-024-03406-w).
 
-Dr. Sara Espinoza
+## License
 
-e-mail: sara.espinoza@dechema.de  
-Internet: https://www.dechema.de
+- Vocabularies in this repository are released under CC0 1.0 Universal (CC0-1.0). See LICENSE for details.  
+- The repository template for maintaining vocabularies like Voc4Cat is also released under CC0-1.0 as documented in [nfdi4cat/voc4cat-template](https://github.com/nfdi4cat/voc4cat-template).
+- The [voc4cat Python package](https://pypi.org/project/voc4cat/) is released under 3-Clause BSD License (BSD-3-Clause) as documented in its repository [nfdi4cat/voc4cat-tool](https://github.com/nfdi4cat/voc4cat-tool).
+
+## Funding
+
+<img src="./media/dfg.png" alt="DFG logo" />
+
+The creation and mainteanance of Voc4Cat has been funded by the German Research Foundation (DFG) through the project "[NFDI4Cat](https://nfdi4cat.org/) - NFDI for Catalysis-Related
+Sciences" (DFG project no. [441926934](https://gepris.dfg.de/gepris/projekt/441926934)),
+within the National Research Data Infrastructure ([NFDI](https://www.nfdi.de/)) programme of the Joint Science Conference (GWK).