| 基于幂集的查询模型及其查询能力 |
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| 引用本文： | 李霖. 基于幂集的查询模型及其查询能力[J]. 武汉大学学报 ( 信息科学版), 1998, 23(4): 374-376. |
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| 作者姓名： | 李霖 |
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| 作者单位： | 武汉测绘科技大学土地科学学院, 武汉市珞喻路129号, 430079 |
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| 摘 要： | 分析了一般数据库的查询模型,提出基于集合构造的幂集查询模型,基于数据模型的特点定义了能评价查询模型强弱的查询能力,据此讨论了幂集查询模型的能力及其特点。
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| 关 键 词： | 数据模型 查询模型 查询能力 |
| 收稿时间： | 1998-07-20 |
Powerset based Query Model and Its Query Capacity |
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| Li Lin. Powerset-based Query Model and Its Query Capacity[J]. Geomatics and Information Science of Wuhan University, 1998, 23(4): 374-376. |
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| Authors: | Li Lin |
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| Affiliation: | School of Land Science, WTUSM, 129 Luoyu Road, Wuhan, China, 430079 |
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| Abstract: | An elementary query model is a key factor to implement spatial information query in GIS. A common query model in database is outlined in this paper and a powerset query mode is put forward based on construction of set. In regard to data models, a query capacity is defined for assessment of query models. The powerset based query model is examined according to the capacity. |
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| Keywords: | data model query model query capacity |
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