其次，它使关系和它们的语义变成显式的，而在标准的数据库模式中许多关系隐含在模式的设计中。
Second, it makes the relations and their semantics explicit, whereas in a standard database schema many relations are implicit in design of the schema.
这个知识库需要具备合适的语义，以及信息、用户和服务之间的关系。
This knowledge base needs to have proper semantics, with relationships defined between the information, users, and services.
执行任何关系的语义或者两对象间关系的引用完整性不需要CM IS知识库。
CMIS repositories are not required to enforce any semantics of relationships or enforce referential integrity between the two objects of a relationship.
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