Together with domain and entity and integrity, referential integrity embodies the integrity principles of relational information systems. While relational databases address applications for data that is certain, modern day applications require the handling of uncertain data. In particular, the veracity of big data and the complex integration of data from heterogeneous sources leave referential integrity […]

Graph database are increasingly popular for data management and analytics. As with every data model, managing the integrity of entities is fundamental for data governance but also important for the efficiency of update and query operations. In response to current shortcomings of uniqueness and existence constraints in graph databases, we propose a new principled class […]