SIGMA: A Semantic-Grounded Instruction-Driven Generative Multi-Task Recommender at AliExpress.

@inproceedings{yu-2026-sigma, author = {Yang Yu and Lei Kou and Huaikuan Yi and Bin Chen and Yayu Cao and Lei Shen and Chao Zhang and Bing Wang and Xiaoyi Zeng}, editor = {Hannah Bast and Alistair Moffat and Falk Scholer and Marc Najork and Min Zhang and Hannah Bast and Marc Najork and Min Zhang}, title = {{SIGMA: A Semantic-Grounded Instruction-Driven Generative Multi-Task Recommender at AliExpress}}, booktitle = {{Proceedings of the 49th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2026, MelbourneVICAustralia, July 20-24, 2026}}, pages = {5055--5059}, publisher = {ACM}, year = {2026}, url = {https://doi.org/10.1145/3805712.3808421}, doi = {https://doi.org/10.1145/3805712.3808421} }