Exploring Scholarly Data by Semantic Query on Knowledge Graph Embedding Space

TL;DR

This paper introduces a framework for exploring scholarly data using semantic queries in knowledge graph embedding space, enabling advanced data analysis and discovery beyond traditional methods.

Contribution

It proposes a novel approach to analyze semantic structures in knowledge graph embeddings for scholarly data exploration and defines algebraic semantic queries for this purpose.

Findings

Framework for semantic data exploration established

Semantic queries support similarity and analogy tasks

New research tasks enabled by embedding space structures

Abstract

The trends of open science have enabled several open scholarly datasets which include millions of papers and authors. Managing, exploring, and utilizing such large and complicated datasets effectively are challenging. In recent years, the knowledge graph has emerged as a universal data format for representing knowledge about heterogeneous entities and their relationships. The knowledge graph can be modeled by knowledge graph embedding methods, which represent entities and relations as embedding vectors in semantic space, then model the interactions between these embedding vectors. However, the semantic structures in the knowledge graph embedding space are not well-studied, thus knowledge graph embedding methods are usually only used for knowledge graph completion but not data representation and analysis. In this paper, we propose to analyze these semantic structures based on the well-studied word embedding space and use them to support data exploration. We also define the semantic queries, which are algebraic operations between the embedding vectors in the knowledge graph embedding space, to solve queries such as similarity and analogy between the entities on the original datasets. We then design a general framework for data exploration by semantic queries and discuss the solution to some traditional scholarly data exploration tasks. We also propose some new interesting tasks that can be solved based on the uncanny semantic structures of the embedding space.