Hello Zoran,
The general approach we recommend is to mock the data to be able to use it in DataSource components in the Report Designer. This will allow connecting the data items (Map for example) to the data and configure their properties through the dedicated wizards which can ease the report's creation significantly.
Then, you can change the data at run-time using the Reporting API. If you use Reporting REST service for rendering reports modifications need to be applied in a custom report resolver.
Regards,
Katia
Progress Telerik
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