Currently, archival practice is moving towards the definition of complex relationships between the resources of interest as well as the constitution of compound digital objects. To this end archives can take advantage of using the
Open Archives Initiative - Object Reuse and Exchange (OAI-ORE)
providing additional and flexible visualizations of archival resources.
In this paper we define a formal basis that provides a means for defining OAI-ORE instances which are consistent with the fundamental archival principles.