A multi - tier , object - oriented data model is developed in response to complex requirements of urban transit system 摘要基于面向对象的建模工具,设计了满足复杂环境需求的多层次公交数据模型。
As a result , spatio - temporal object - oriented data model and moving object data model behave more strongly in the expressions of the spatio - temporal objects 结果表明,面向对象数据模型和移动对象数据模型在时空对象的表达上体现了较强的能力。
On the way to making a point about how xml is best suited to work with databases , david mertz discusses how xml fits with hierarchical , relational , and object - oriented data modeling paradigms 在证明xml最适合于配合数据库使用的过程中, david mertz讨论了xml是如何适应层次、关系和面向对象数据建模范例的。
The object - oriented data model is transformed to relationship data model by means of the translation of relationship tables in oodbms to conventionally data definition language in rdbms 在设计阶段,通过将面向对象中的关系表用传统关系数据库的数据定义语言来描述,从而实现了面向对象数据模型向关系型数据模型的转换。
The mapping between global schema , export schema and local schema is presented based on the model , which solves the problem of mapping between jidm and relational data , xml files , object - oriented data model 在该模型的基础上,介绍了全局模式、输出模式以及局部模式之间的映射关系,解决了jidm模型与关系模型、 xml文件以及面向对象模型之间的映射问题。