摘要
为了有效地实现多媒体地理信息系统 ( multimediageographic information system,MGIS)数据的存储和管理 ,必须设计有效的数据模型。但现有的几种多媒体数据模型( NF2模型、面向对象模型和超媒体模型等 )尚不能满足MGIS数据管理的要求。为此 ,深入分析了现有几种多媒体数据模型的优缺点及其相互关系 ,提出了一种新的、集现有几种多媒体数据模型优点于一体的多媒体数据组织和管理模型 ,即基于对象关系的超媒体数据模型 ( hyper-mediadata model based on object-relation,O-RHDM) ,论述了 O-RHDM的原理和方法 ,并给出了该模型的规范化描述和操作运算的数学定义。
Multi media data models were developed to facilitate multimedia spatial data organization and management in the of Multimedia Geographic Information System (MGIS). Existing multimedia data models such as the of multimedia data model based on the of Non First Normal Form (NF2), object oriented data models and hyper media data models do not meet the needs of MGIS. A new multimedia data model, Hypermedia Data Model Based on Object Relations (O RHDM) was developed based on the analysis of the advantages and weaknesses of earlier multimedia data models. The O RHDM mathematical description and the of operational calculation definition were studied using the algebraic method and set theory. This model was applied to the Multimedia Touring Information System of Hainan Province as a specific example.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第6期103-107,共5页
Journal of Tsinghua University(Science and Technology)
基金
中国博士后基金
关键词
多媒体数据模型
对象-关系超媒体数据模型
MGIS
multimedia data model
hyper-media data model based on object -relation
mathematics description and operational definition
