Update metadata.qmd

docs/metadata.qmd

@@ -49,3 +49,12 @@ Currently no 'good practice' exists to offer discovery services in alternative p
 | Cookbook | Software | Description |
 | --- | ---| --- |
 | [dcat](cookbook/dcat.qmd) | - | A dcat approach to dataset discovery |
+
+## Metadata in EJP Soil
+
+The EJP Soil programm aims to collect metadata of datasets uused in all EJP Soil projects and provide a search interface on these datasets. The metadata is currently maintained at https://github.com/ejpsoil/ejpsoildatahub and the search interface is available at https://catalogue.ejpsoil.eu. Data scientists in any of the EJP Soil projects are encouraged to share their published datasets via https://github.com/ejpsoil/ejpsoildatahub. This decision tree can be followed:
+
+- If datasets are published on a repository providing a DOI or CSW, share a list of these DOI's or CSW uuid's on the relevant [hub folder](https://github.com/ejpsoil/ejpsoildatahub/tree/main/datasets/research/EJP%20Research).
+- If datasets are not published (yet), you can use this [spreadsheet](./EUSO Data WG metadata template_20231103.xlsx) to list a minimal set of metadata properties for each dataset. 
+
+Send the list as a [Pull Request](https://github.com/ejpsoil/ejpsoildatahub/pulls), [Issue](https://github.com/ejpsoil/ejpsoildatahub/issues) or email to the maintainers.