The eProcurement Ontology, as developed by the Publications Office of the EU, is a foundational work for shaping the eProcurement landscape across the EU, especially so as key components (eForms, ESPD, eCertis, …) are continuously improved and harmonised. Whilst the Ontology per se is a very comprehensive effort, there appears to be a missing link as far as new data architecture initiatives (notably the Data Strategy, the European Blockchain Services Infrastructure and GAIA-X) are concerned. Liasing with such initiatives, at the governance, semantic and data architecture levels, is of the utmost importance to create a rich and effective data ecosystem. We will examine governance and technical aspects of such liasing, with a special focus on the European Blockchain Services Infrastructure.