Categorizing questions in a question answering system

摘要

A mechanism is provided in a question answering system for categorizing questions. The mechanism clusters documents from a corpus of documents to form a nested structure of clusters of documents. The mechanism records questions answered by question answering system in a database in association with answers returned and answer confidence values. The mechanism maps the questions to the nested structure of clusters of documents to form a nested structure of clusters of questions. The mechanism presents recommended questions based on the nested structure of clusters of questions in a user interface of the question answering system.