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Representation learning in heterogeneous graphs (HG) is intended to provide a meaningful vector representation for each node so as to facilitate downstream applications such as link prediction, personalized recommendation, node classification, etc. This task, however, is challenging not only because of the need to incorporate heterogeneous structural (graph) information consisting of multiple types of node and edge, but also the need to consider heterogeneous attributes or types of content (e.g. text or image) associated with each node. Although considerable advances have been made in homogeneous (and heterogeneous) graph embedding, attributed graph embedding and graph neural networks, few are capable of simultaneously and effectively taking into account heterogeneous structural (graph) information as well as the heterogeneous content information of each node.
In this book, we provide a comprehensive survey of current developments in HG representation learning. More importantly, we present the state-of-the-art in this field, including theoretical models and real applications that have been showcased at the top conferences and journals, such as TKDE, KDD, WWW, IJCAI and AAAI. The book has two major objectives: (1) to provide researchers with an understanding of the fundamental issues and a good point of departure for working in this rapidly expanding field, and (2) to present the latest research on applying heterogeneous graphs to model real systems and learning structural features of interaction systems. To the best of our knowledge, it is the first book to summarize the latest developments and present cutting-edge research on heterogeneous graph representation learning. To gain the most from it, readers should have a basic grasp of computer science, data mining and machine learning.

Heterogeneous Graph Representation Learning and Applications

1.     Introduction

1.1   Basic concepts and definitions

1.2   Graph representation

1.3   Heterogeneous graph representation and challenges

1.4   Organization of the book

2.     The State-of-the-art of Heterogeneous Graph Representation

2.1   Method taxonomy

2.1.1        Structure-preserved representation

2.1.2        Attribute-assisted representation

2.1.3        Dynamic representation

2.1.4        Application-oriented representation

2.2   Technique summary

2.2.1        Shallow model

2.2.2        Deep model

2.3   Open sources

 

Part One: Techniques

3.     Structure-preserved Heterogeneous Graph Representation

3.1   Meta-path based random walk 

3.2   Meta-path based decomposition

3.3   Relation structure awareness

3.4   Network schema preservation

4.     Attribute-assisted Heterogeneous Graph Representation

4.1   Heterogeneous graph attention network

4.2   Heterogeneous graph structure learning

5.     Dynamic Heterogeneous Graph Representation

5.1   Incremental Learning

5.2   Temporal Interaction

5.3   Sequence Information

6.     Supplementary of Heterogeneous Graph Representation

6.1   Adversarial Learning

6.2   Importance Sampling

6.3   Hyperbolic Representation

 

Part Two: Applications  

7.     Heterogeneous Graph Representation for Recommendation

7.1   Top-N Recommendation

7.2   Cold-start Recommendation

7.3   Author Set Recommendation

8.     Heterogeneous Graph Representation for Text Mining

8.1   Short Text Classification

8.2   News Recommendation with Preference Disentanglement

8.3   News recommendation with long/short-term interest modeling

9.     Heterogeneous Graph Representation for Industry Application

9.1   Cash-out User Detection

9.2   Intent Recommendation

9.3   Share Recommendation

9.4   Friend-Enhanced Recommendation

10.   Future Research Directions

11.   Conclusion