@PISINIM7 if its a page type d page you can refer Dpage.property the same way we do refer any page property.

if its a list type then it will be diferrent use case all together , showing of multiple data in grid.

@PISINIM7  could you please try giving page context before property as datapage and please define the same in pages and classes. Please perform all changes in section. 

@PISINIM7

For List Type Data Pages:  

Approach1:You can use repeating grid in the section with Source as Data Page. Once the Repeating grid is configured with Data Page then you can add all the properties in that data class/ hierarchy class as columns in the Repeating Grid. When the section is displayed on the UI Data Page will be triggered and data will be displayed to  User.

Approach2: Using Repeating Dynamic Layout. Create a section in the data page data class and specify all the properties in that section. Now for Repeating Dynamic Layout source Data Page and specify the section name in section. Data will be displayed on the UI.

For Single Page Data Pages: 

If its single data page instead of list then just create a section in the data class of data page and specify all the properties in that section. Now in the main section drag and drop sections from configs and select the source as Data Page and specify the class of data page and give data page name and section. In run time data page will be invoked and all the properties which have data on the data page will be displayed with values on the UI.