This document summarizes and explains the concept of CDE solution and workflow - hereby abbreviated by CDE . The concept of CDE is primarily defined but not extensively explained in EN ISO 19650 series. Due to the very nature of the EN ISO 19650 series the standardized definition and usage of CDE described in the very series can be too abstract for direct implementation. By explaining the CDE concept in more detail this document will also serve as an implementation guidance. Doing so this document will detail the following concepts introduced by EN ISO 19650: workflow as a collaborative process of managing the information and information containers, solutions to support the management and project processes inherent for BIM. Archiving and versioning of information containers can become very complex when considering various typical information situations of a project. Further elements, rules and terminology for information management and digitisation needs to be explained and technically framed in the context of a CDE. In particular this document describes: the framework established by the concepts in and around the CDE concept of EN ISO 19650, the relation between workflow and solution by differentiating between process and entity management using the layer concept and the connection between workflow and solution by using Information Delivery Plans (MIDP and TIDP in ISO 19650). This document enables thereby the market participant and CDE user on: how to manage processes in collaborative information management according to EN ISO 19650, how to manage entities (e.g. Information Containers like models, requirements, container states), how to maintain and manage living documents like Information Models (AIM, PIM) and how to maintain, exchange and manage Information Requirements like (OIR, AIR, EIR) as well as BIM Execution Plans (BEP). This document identifies the range of important terms related to the CDE concept and associated relationships to relevant normative references. This document is accompanied by a parallel work item within CEN/TC 442 defining Application Programming Interface for the information management interfacing between various CDE and CDE solutions. This European standard (under development) named Open API for CDE is being developed within a Joint Task group of CEN/TC 442/WG2 and CEN/TC 442/WG 3.