OQL

OQL ( Ontology query language ) is used as the query language of the data integration system .

在查询接口部分，采用了OQL（Ontologyquerylanguage）作为查询语言。

Other less familiar query languages include Object Query Language ( OQL ) and XQuery .

其他不那么常见的查询语言还有对象查询语言（OQL）和XQuery。

Screen shot showing the output from the OQL query

截图显示的是OQL查询的输出

Fortunately , jhat supports an OQL syntax for doing that analysis .

幸运的是，jhat支持OQL语法进行这样的分析。

Ramnarayan added that GFMon also provides ad-hoc querying facilities via OQL .

Ramnarayan补充说，GFMon通过OQL还能够提供ad-hoc查询设备。

OQL Logical Optimization Rules

OQL逻辑优化准则

On the surface , OQL seems remarkably similar to SQL , and thus supposedly just as powerful and easy to use .

表面上看，OQL非常类似于SQL，因此它应该和SQL一样强大并且易于使用。

It supplies OQL with update statement , and analyses its process flow . The improved BNF for OQL is given .

为OQL语言补充了更新操作，分析了其工作过程，并给出了改进的OQL的BNF范式。

OQL queries can also invoke methods on the objects themselves , use regular expressions as part of the query , and use built-in query tools .

OQL查询同样可以调用对象的方法，将正则表达式作为查询的一部分，并使用内置查询工具。

Combining jhat with OQL is a powerful way to do a targeted investigation of a misbehaving heap .

将jhat与OQL相结合是对行为不当的堆进行对象调查的有效方法。

Having constructed the frame of management of object-oriented software reverse engineering database , including management of collective development , management of class library , management of using OQL to query , and so on ;

构建了面向对象的软件逆向工程数据库的管理系统框架，包括对集体开发的管理、对类库的管理以及使用OQL语言对数据库进行查询的管理等；

Ramnarayan mentioned that these queries can be expressed in the Object Query Language ( OQL ) - a standard supported by prior GemFire releases as well .

Ramnarayan提到可以用对象查询语言（ObjectQueryLanguage，即OQL&GemFire之前的版本也支持此标准）来表示这些查询。

On this basis , it raises a query optimization model for OQL by introducing some query theories of RDB into the query process of OODB , and gives its implement strategy .

在此基础上，将RDB的一些查询理论应用于OODB的查询中，提出了一种OQL的查询优化模型，并给出其实现策略。