Now pretend you have the data schema as your starting point 现在假设你拥有此数据模式作为你的起点。
A data schema , especially a data subschema in a relational data system 关系数据系统中的数据模式,特别是子模式。
Line 3 : we do not have a particular data schema , so let ' s skip that 第3行:我们并没有特定的数据模式,所以我们忽略它。
Why is basing your object model on an existing data schema a bad idea 为什么以已有的数据模式作为对象模型的基础不是一个好主意?
Consider figure 1 which depicts three object schemas , all of which can be correctly mapped to the data schema on the right 考虑绘制了三个对象模式的图表1 ,其中每个都能够正确的映射右边的数据模式。
Xml - data reduced refers to the subset of the xml - data schema specification that was made available in msxml 3 . 0 and later Xml数据缩减是指xml数据架构规范的一个子集,在msxml 3 . 0以及更高版本中提供。
That is , you do not need to have the same formatter class in the receiver as you had in the sender , as long as both parties know the data schema 也就是说,如果双方知道数据的结构,接收方就不必拥有同发送方相同的格式化程序类。
You can also include custom code , references to assemblies and classes , and the names of data output elements , data transforms , and data schemas 还可以包括自定义代码、程序集和类的引用,以及数据输出元素、数据转换和数据架构的名称。
We will also look into the effects of changes in the business requirements on the data schema evolution and its impact on the application code and the relational schema 还将讲述业务需求更改对数据的影响(模式演化)以及对应用程序代码和关系模式的影响。
Yes , all of the models in figure 1 could be improved , but i needed a simple example that showed how different object schemas mapping to the same data schema 是的,图表1中的所有模型都可以改进,但是我只是需要一个展示不同对象模式怎样映射到同一数据模式的简单例子。