Needs additional discussion (e.g. ESPD....is it a document or two?).
Other possible modifications that were arisen today (20180514) during the discussions on the glossary (e.g. the concept of Call for Competition; or "does the Call for Tenders" exist as a document? And what about the Invitation to Tender?).
We have updated the following diagram of the conceptual data model (see here), taking into account the backbone: