不过，在项目与属性名称、注解、处理指示或cdata区段中不允许字元实体参考。
However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.
您要设置您想在运行时使用的数据源或者资源参考，以及为所有实体使用的默认方案。
You set the data source or resource reference that you want to use at runtime, along with the default schema to use for all of your entities.
相反，规范化数据模型是 SOA 包含的所有数据库和相关遗留应用程序中的所有实体及其关系的参考。
Rather, the canonical data model is the reference for all of the entities and their relationships across all of the databases and related legacy applications that the SOA encompasses.
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