按照任务的目的和要求，设计了其数据库系统结构：定义数据、表、创建数据关系模型及设计数据结构。
According to the demands, the structure of the database has been designed: defining data, defining table, building relation data model and designing the data structure.
那么XML与关系数据模型之间的关系究竟是怎样的？
So just what is the relationship between XML and the relational data model?
逻辑数据模型定义实体以及实体之间的关系，而不考虑实现平台。
A logical data model defines entities and relationships between entities without consideration of the implementation platform.
它们由逻辑数据模型转换而来，其中实体和关系转换为表、列、主键、外键以及约束。
They are transformations of logical data model where the entities and relationships are transformed into tables, columns, primary keys, foreign keys, and constraints.
数据模型很快就会变得非常庞大，包含很多实体和关系。
Data models quickly become very large with many entities and relationships.
XML中次序的重要性与关系数据模型中缺少固有次序形成了鲜明对比。
The importance of order in XML contrasts sharply with the absence of intrinsic order in the relational data model.
一个逻辑数据模型不受不同实体之间关系的限制。
A logical data model is not constrained regarding possible relationships between different entities.
JPA是一个用于对象关系映射以及数据支持的简化程序模型。
JPA is a simplified programming model used for object relational mapping and data persistence.
如果要为SQL应用程序的程序员提供本地XML数据的关系模型，那么这种功能特别有用。
This is particularly useful if you'd like to present your SQL application programmers with a relational model of your native XML data.
但是，如果大多数数据更适合采用高度结构化的实体-关系模型，数据不太像文档并且关系更复杂，那么选择NXD可能并不合适。
If, however, the majority of your data fits better in a highly structured entity-relationship model and is less document-like and more intertwined, then choosing an NXD might not help your situation.
逻辑数据模型：逻辑数据模型代表企业实体、实体属性(数据)，以及它们之间的关系。
Logical data model: Logical data model represents the enterprise entities, their attributes (data) and the relationship among them.
所幸我不必局限于关系数据模型。
IT系统使用关系数据模型、大文件、面向对象模型和私有数据模型来对意义进行组织。
IT systems organize meanings using relational data models, flat files, object-oriented models, or proprietary data models.
与关系数据库相比，面向对象模型支持更丰富的关系
Richer relationships allowed by object orientation that aren't supported by relational databases
将XML数据映射到关系模型不是一件普通的任务(这也许就是市场上存在多种映射解决方案的原因之一)。
Mapping XML data to the relational model is not a trivial task (maybe one of the reasons for the variety of mapping solutions in the market).
crm包代表了客户关系管理服务数据模型的设计，该模型在一系列的服务中可以得到重复使用，以及不太组织提供的服务。
The CRM package represents the design of a Customer Relationship Management service data model that can be reused in a number of services, even services provided by different organizations.
关系数据库模型和SQL语言的使用必须考虑到企业级性能和可伸缩性。
The relational data model and use of the SQL language allows for enterprise level performance and scalability.
对于包含SOA项目的相关数据的各个系统，规范化数据模型为关键实体、它们的属性和关系提供一致的定义。
A canonical data model provides a consistent definition of key entities, their attributes and relationships across the various systems that hold relevant data for the SOA project.
这两种都是关系型的数据库，因而包含了关系模型及其集合处理的长处。
They are relational databases that provide the strengths of the relational model and its set processing.
这是将对象模型映射到关系数据库模型的一种典型框架。
This is typical of frameworks that map object models to relational database models.
YQL使用人们熟悉的表格与行的关系数据库模型。
YQL USES the familiar relational database model of tables and rows.
模型是一个关系数据库。
每个汇总报告对有关线性模型和数据之间关系的各种分析问题提供了答案。
Each summary report provides answers to different analytic questions that you might have about the relationship of your linear model to the data.
在概念模式后出现的是逻辑模式——用更多的细节定义概念，并显示实体之间的关系的数据模型。
After the conceptual schema comes the logical schema — the data model that defines the concepts with greater detail and shows the relationships between the entities.
它提供了远程数据的DB 2关系模型，并通过向远程数据源发送子查询以帮助联邦引擎实现查询处理。
It provides a DB2 relational model for the remote data and assists the federated engine in query processing by sending sub-queries to the remote data source.
数据库模型：包括SOA使用的数据库的实体关系图。
Database model: Includes an entity relationship diagram for the databases the SOA USES.
软件架构师还与业务分析人员一起理解当前系统的数据需求及它们到IAA 数据模型的关系。
The Software Architect also works with the Business Analyst in understanding the data requirements of the current systems and their relationship to the IAA data model.
在展开数据库模式模型时，可以看到关系表和列。
When you expand the database schema model you can see the relational tables and columns.
用基于 SQL 的模式可以把数据呈现从对象模型映射到关系数据模型，对象关系映射引用了这项技术。
Object relational mapping refers to the technique of mapping the data representation from an object model to a relational data model with a SQL-based schema.
为了捕获概念性的实体-关系模型，为每一个复合数据建立一个关系模型元素。
For each CompositeData, an entity model element is also created in order to capture conceptual entity-relationship models.
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