Improved Knowledge Graph Embedding Using Background Taxonomic Information

  • Bahare Fatemi University of British Columbia
  • Siamak Ravanbakhsh University of British Columbia
  • David Poole University of British Columbia

Abstract

Knowledge graphs are used to represent relational information in terms of triples. To enable learning about domains, embedding models, such as tensor factorization models, can be used to make predictions of new triples. Often there is background taxonomic information (in terms of subclasses and subproperties) that should also be taken into account. We show that existing fully expressive (a.k.a. universal) models cannot provably respect subclass and subproperty information. We show that minimal modifications to an existing knowledge graph completion method enables injection of taxonomic information. Moreover, we prove that our model is fully expressive, assuming a lower-bound on the size of the embeddings. Experimental results on public knowledge graphs show that despite its simplicity our approach is surprisingly effective.

Published
2019-07-17
Section
AAAI Technical Track: Machine Learning