The article explores how data can be accessed in a Data Grid, which is a system for storing information. Unlike traditional databases, the Data Grid's structure can be more varied and complex. The researchers examine three ways to interact with this data: using programming languages like C++, Java, or C#; a query language similar to SQL; and through a descriptive language called XML. They found that the evolving SQL99 standard helps access data in different structures, such as object-relational formats. By studying these language interfaces, researchers are making it easier to work with diverse data types within the Data Grid.