Note that the transformation will generate a warning because the model does not specify a target namespace, a requirement for the schema.

注意转换将产生一个警告，因为模型没有指定目标命名空间，而这是模式的一个要求。

youdao

For instance, one DOAP requirement states that there must be a "homepage" property, so you can use an XML schema to catch those.

例如，一条DOAP需求说，必须有一个“ homepage ”属性，那么您可以用一个XML模式来捕获那些错误。

youdao

However, the schema for topology model does not enforce any strict association between unit and requirement types.

然而，拓扑模型方案并不强制单元与需求之间有任何严格的关联。

youdao

Now, RDBMS and SQL somewhat goes directly against the principles that forced Hadoop to be created in the first place, which is requirement to have a predefined structure (known as a schema) of the data being stored.

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