'<h2 class=papertitle> Dynamic evolution and consistency of collaborative configurations in object-Oriented databases </h2> <p class=paperauthor> A. Al-Khudair, W. A. Gray, J. C. Miles <span class=institution> Cardiff University </span> <p class=paperabstract> This paper proposes a generic object-oriented model which captures the semantic extension of versions of dynamic configurations in a collaborative engineering design environment. We will extend the notion of transient, working and released versions of a simple object to transient, working and released versions of a configuration and look at how the consistency between a configuration version and its components  versions can be maintained using a special object called a consistency descriptor. The problem of maintaining semantic consistency of relationships in multiversion configurations will also be addressed. A novel hybrid architecture of deign workspaces in object-oriented databases will be introduced which allows the collaboration in all levels of the workspaces hierarchy.'