Dealing with Empty and Overabundant Answers to Flexible Queries

• 作者: Samyr Abrah?o Moises Silvio do Lago Pereira
• 来源期刊: 数据分析和信息处理(英文)
• 学科: 医学
• 关键词: RELATIONAL Database Fuzzy Logic FLEXIBLE QUERY EMPTY ANSWER Overabundant ANSWER
• 年，卷（期）: 2014,（1）
• 页码范围: 12-18
• 页数: 7页
• 分类号: R73

摘要

In traditional database applications, queries intend to retrieve data satisfying precise conditions. As a result, thousands of data can be retrieved (overabundant answer) or, even worse, no data at all (empty answer). In both cases, the queries must be reformulated to produce more significant results and, typically, many related queries are submitted by a user before he can be finally satisfied. To overcome these problems, this paper proposes a unified solution in the framework of flexible queries with fuzzy semantics. This solution, based on the concept of semantic proximity and implemented in a tool for flexible query answering, allows the automatic reformulation of queries with empty or overabundant answers.