A Self-attention Network Based Node Embedding Model

• Published in: Machine Learning and Knowledge Discovery in Databases Vol. 12459; pp. 364 - 377
• Main Authors: Nguyen, Dai Quoc, Nguyen, Tu Dinh, Phung, Dinh
• Format: Book Chapter
• Language: English
• Published: Switzerland Springer International Publishing AG 2021; Springer International Publishing
• Series: Lecture Notes in Computer Science
• Subjects: Node classification; Node embeddings; Self-attention network; Transformer
• ISBN: 3030676633; 9783030676636
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-030-67664-3_22

Despite several signs of progress have been made recently, limited research has been conducted for an inductive setting where embeddings are required for newly unseen nodes – a setting encountered commonly in practical applications of deep learning for graph networks. This significantly affects the performances of downstream tasks such as node classification, link prediction or community extraction. To this end, we propose SANNE – a novel unsupervised embedding model – whose central idea is to employ a transformer self-attention network to iteratively aggregate vector representations of nodes in random walks. Our SANNE aims to produce plausible embeddings not only for present nodes, but also for newly unseen nodes. Experimental results show that the proposed SANNE obtains state-of-the-art results for the node classification task on well-known benchmark datasets.