Hogan, A., Blomqvist, E., Cochez, M., d’Amato, C., de Melo, G., Gutierrez, C., Kirrane, S., Labra Gayo, J.E., Navigli, R., Neumaier, S., Ngonga Ngomo, A.-C., Polleres, A., Rashid, S.M., Rula, A., Schmelzeisen, L., Sequeda, J., Staab, S. and Zimmermann, A. (2021) ‘Knowledge Graphs’, ACM Computing Surveys, 54(4).



Hogan and colleagues describe knowledge graphs as graph-based structures for integrating, managing and extracting value from diverse, dynamic and large-scale data. The key epistemic operation is relational explicitness: entities become intelligible not only through attributes but through edges, paths, ontologies, rules and navigable patterns. Graph abstraction also postpones some schema commitments, allowing structure to evolve while queries, validation and analytics operate across the network. This bridges databases, semantic technologies, artificial intelligence and knowledge representation. For a conceptual corpus, the important shift is from list to topology. Once concepts become nodes, cross-references can be inspected as paths, clustering can reveal concentrations, and versioned relations can expose how a field changes. Yet a knowledge graph offers no automatic guarantee that its edges are historically or theoretically justified. The graph makes relations calculable; it does not make them true. Its value to the Lexicum lies therefore in separating structural affordance from interpretive authority: machine traversal can expose a field’s architecture without replacing critical reading.