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Web"],"published-print":{"date-parts":[[2023,8,31]]},"abstract":"<jats:p>The prevalent heterogeneous Graph Neural Network (GNN) models learn node and graph representations using pre-defined meta-paths or only automatically discovering meta-paths. However, the existing methods suffer from information loss due to neglecting undiscovered meta-structures with richer semantics than meta-paths in heterogeneous graphs. To take advantage of the current rich meta-structures in heterogeneous graphs, we propose a novel approach called HeGTM to automatically extract essential meta-structures (i.e., meta-paths and meta-graphs) from heterogeneous graphs. The discovered meta-structures can capture more prosperous relations between different types of nodes that can help the model to learn representations. Furthermore, we apply the proposed approach for text classification. Specifically, we first design a heterogeneous graph for the text corpus, and then apply HeGTM on the constructed text graph to learn better text representations that contain various semantic relations. In addition, our approach can also be used as a strong meta-structure extractor for other GNN models. In other words, the auto-discovered meta-structures can replace the pre-defined meta-paths. The experimental results on text classification demonstrate the effectiveness of our approach to automatically extracting informative meta-structures from heterogeneous graphs and its usefulness in acting as a meta-structure extractor for boosting other GNN models.<\/jats:p>","DOI":"10.1145\/3580508","type":"journal-article","created":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T11:56:46Z","timestamp":1675079806000},"page":"1-27","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Heterogeneous Graph Transformer for Meta-structure Learning with Application in Text Classification"],"prefix":"10.1145","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2888-1922","authenticated-orcid":false,"given":"Shuhai","family":"Wang","sequence":"first","affiliation":[{"name":"School of Information Science and Technology, Shijiazhuang Tiedao University"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3275-4125","authenticated-orcid":false,"given":"Xin","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology, Shijiazhuang Tiedao University"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1778-3019","authenticated-orcid":false,"given":"Xiao","family":"Pan","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology, Shijiazhuang Tiedao University"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5145-8279","authenticated-orcid":false,"given":"Hanjie","family":"Xu","sequence":"additional","affiliation":[{"name":"McMaster University"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6499-7212","authenticated-orcid":false,"given":"Mingrui","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology, Shijiazhuang Tiedao University"}]}],"member":"320","published-online":{"date-parts":[[2023,5,22]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.2200\/S00980ED1V01Y202001AIM045"},{"key":"e_1_3_1_3_2","first-page":"8409","volume-title":"Proceedings of the AAAI","author":"Liu Xien","year":"2020","unstructured":"Xien Liu, Xinxin You, Xiao Zhang, Ji Wu, and Ping Lv. 2020. 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