It is ubiquitous in our daily life, ranging from product taxonomies used by online retailers, topic taxonomies deployed by news outlets and social media, as well as scientific taxonomies deployed by digital libraries across various domains.

This book provides a principled data-driven framework that progressively constructs, enriches, and applies taxonomies without leveraging massive human annotated data. Traditionally, people construct domain-specific taxonomies by extensive manual curations, which is time-consuming and costly. In today’s information era, people are inundated with the vast amounts of text data. Despite their usefulness, people haven’t yet exploited the full power of taxonomies due to the heavy curation needed for creating and maintaining them. To bridge this gap, the authors discuss automated taxonomy discovery and exploration, with an emphasis on label-efficient machine learning methods and their real-world usages. Taxonomy organizes entities and concepts in a hierarchy way. It is ubiquitous in our daily life, ranging from product taxonomies used by online retailers, topic taxonomies deployed by news outlets and social media, as well as scientific taxonomies deployed by digital libraries across various domains. When properly analyzed, these taxonomies can play a vital role for science, engineering, business intelligence, policy design, ecommerce, and more. Intuitive examples are used throughout enabling readers to grasp concepts more easily. In addition, this book:Discusses the process of creating, maintaining, and applying taxonomies via simple, easy-to-understand examplesProvides a systematic review of the current research frontier of each task and discusses their real-world applications Includes supporting materials containing links to commonly used evaluation datasets and a code repository of representative algorithms

Discusses the process of creating, maintaining, and applying taxonomies via simple, easy-to-understand examples Provides a systematic review of the current research frontier of each task and discusses their real-world applications Includes supporting materials containing links to commonly used evaluation datasets and a code repository of representative algorithms