The usage note is as follows: "This property refers to a web page that provides access to the Dataset, its Distributions and/or additional information." Cardinatlity is 0..1. The datasets published on the EU ODP site are not stored on the EU ODP servers, but on the data providers' servers. The EU ODP only publishes the (DCAT-AP) description of the dataset. Often data providers publish their datasets also on their own website. What is in this case the landing page?
This issue has been reported by Willem Van Gemert and David Read: