Update file README.md

README.md

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 # Data flow between CMML and the researchers
 
-CMML uses the Annotated Research Context (ARC) for data exchange. The ARC allows us to easily exchange project metadata, sample sheets, protocols, workflows and measured data via a common folder structure. The ARC is shared via this DataHUB.
+CMML uses the [Annotated Research Context (ARC)](https://arc-rdm.org) for data exchange. The ARC allows us to easily exchange project metadata, sample sheets, protocols, workflows and measured data via a [common folder structure](https://arc-rdm.org/details/organization-principle/). The ARC is shared via this DataHUB.
 
 🚧 This routine is currently being established
 
-💡 Check out the CMML templates in SWATE to describe your study and samples
+💡 Check out the CMML templates in [SWATE](https://swate-alpha.nfdi4plants.org) to describe your study and samples
 
 # Cooperation
 
-All cooperations are based on our user regulation ("Nutzerordnung").
+All cooperations are based on our [user regulation ("Nutzungsordnung")](https://www.plant-biochemistry.hhu.de/facilities/metabolic-profiling/nutzerordnung).
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