1. Lecture Notes in Computer Science;S Auer,2007
2. Frey, J., Müller, K., Hellmann, S., Rahm, E., Vidal, M.E.: Evaluation of metadata representations in RDF stores. Semant. Web 10(2), 205–229 (2019)
3. Frommhold, M., Piris, R.N., Arndt, N., Tramp, S., Petersen, N., Martin, M.: Towards versioning of arbitrary RDF data. In: Proceedings of the 12th International Conference on Semantic Systems, pp. 33–40 (2016)
4. Harris, S., Seaborne, A., Prud’hommeaux, E.: SPARQL 1.1 query language. W3C Recomm. 21(10), 778 (2013)
5. Hartig, O.: Foundations of RDF* and SPARQL* (an alternative approach to statement-level metadata in RDF). In: 11th Alberto Mendelzon International Workshop on Foundations of Data Management (AMW) (2017)