Link not available anymore

[ludwiglierhammer]

Issue

The following link in the documentation is no longer available:

https://cds.climate.copernicus.eu/toolbox/doc/how-to/15_how_to_understand_the_common_data_model/15_how_to_understand_the_common_data_model.html

@aanderss: Could you help?

[aanderss]

CDM Documentation is currently moved to ECMWF Confluence. The links may be updated once this processed is finished.