For traditional modeling techniques, such as entity relationship diagram or data flow diagram, no specific test techniques are available to date.
对于传统的建模技术，例如实体关系图或数据流程图，没有可用的特定测试技术会过时。
Based on the scenario introduced in the Integrating local XML store data section, consider the entity relationship diagram shown in Figure 4 that describes an online bookstore scenario.
结合在集成本地XML存储数据一节介绍的场景，来看看图4所示的实体关系图，该图描述了一个在线书店的场景。
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.
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。
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