The large volumes of structured data currently available, from Web tables to
open-data portals and enterprise data, open up new opportunities for progress
in answering many important scientific, societal, and business questions.
However, finding relevant data is difficult. While search engines have
addressed this problem for Web documents, there are many new challenges
involved in supporting the discovery of structured data. We demonstrate how the
Auctus dataset search engine addresses some of these challenges. We describe
the system architecture and how users can explore datasets through a rich set
of queries. We also present case studies which show how Auctus supports data
augmentation to improve machine learning models as well as to enrich analytics.

展示了 Auctus 数据集搜索引擎如何解决搜索结构化数据的困难，介绍了其系统架构和查询方式，并展示了它如何支持数据增强以改进机器学习模型以及丰富分析。

Auctus：数据增强的数据集搜索引擎

Auctus: A Dataset Search Engine for Data Augmentation

A search engine's ability to retrieve desirable datasets is important for
data sharing and reuse. Existing dataset search engines typically rely on
matching queries to dataset descriptions. However, a user may not have enough
prior knowledge to write a query using terms that match with description
text.We propose a novel schema label generation model which generates possible
schema labels based on dataset table content. We incorporate the generated
schema labels into a mixed ranking model which not only considers the relevance
between the query and dataset metadata but also the similarity between the
query and generated schema labels. To evaluate our method on real-world
datasets, we create a new benchmark specifically for the dataset retrieval
task. Experiments show that our approach can effectively improve the precision
and NDCG scores of the dataset retrieval task compared with baseline methods.
We also test on a collection of Wikipedia tables to show that the features
generated from schema labels can improve the unsupervised and supervised web
table retrieval task as well.

本研究提出了一种新的基于数据集表格内容的模式标签生成模型，将该模型生成的模式标签与数据集元数据相结合，基于混合排序模型为数据集检索任务提供更高的检索准确率和 NDCG 得分，并在 Wikipedia 数据集上测试表明模式标签能够改善无监督和有监督的 Web 表格检索任务。