Introduction

The CDP4® has a typical three tier architecture. The Web Services component is the application server that makes it possible to share data and perform concurrent and collaborative engineering. It exposes a REST API that supports reading and writing data – it is the “gate” to the central repository where concurrent design teams share information. The persistence layer stores all the data. The CDP4® Database provides access to the full history of all changes created to the data along the three axes: "who, what, when".

The CDP4 is an implementation of ECSS-E-TM-10-25A Annex A and C. ECSS-E-TM-10-25A Annex A is the so-called master model that is expressed in UML. ECSS-E-TM-10-25A Annex C describes the REST API as well as the ZIP archive format.