JPA还拥有可以用于对象模型的全功能查询语言。
JPA also has a fully functional query language that can work against an object model.
DPTK查询表达式语言提供用于指定模型遍历的多种步骤。
The DPTK query expression language provides for several kinds of steps with which to specify model traversals.
创建一种能够被转换为查询您的对象模型的查询语言。
Create a query language to be translated into a query against your object model.
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