Theoretical Investigation of Access Mechanisms for Semantically Motivated Database Models

语义驱动数据库模型访问机制的理论研究

• 批准号: 8719875
• 负责人: Richard Hull
• 金额: $ 9万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1990-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719875&HistoricalAwards=false
• 关键词: Theoretical; Investigation; Access; Mechanisms; Semantically

The semantically-motivated database models provide constructs for structuring data which correlate with the ways that database users think about it. Prominent examples are the semantic models, the non-first normal form relational model, and data models for supporting the engineering design life-cycle. The research proposed here will focus on the development and theoretical study of access mechanisms for these models. These will include a variety of mathematically defined query langauges for semantic models, including generalizations of the relational calculus and algebra, and of deductive databases. Mechanisms for reducing the inherit complexity of these query languages will be explored.

语义驱动的数据库模型提供了用于 结构化数据，与数据库用户的思维方式相关 了 突出的例子是语义模型，非第一范式 关系模型和支持工程设计的数据模型 生命周期 本文的研究将集中在发展和理论上， 研究这些模型的访问机制。 其中将包括一个 用于语义模型的各种数学定义的查询语言， 包括关系演算和代数的推广，以及 演绎数据库 降低遗传复杂性的机制 将探讨这些查询语言。