A report definition is processed by a report processor to generate a report. The report definition includes a plurality of data regions arranged on a page, where the data regions as arranged on the page in the report definition extend in multiple dimensions selected from a group consisting of across the page, down page and layered on the page. The report processor has a data extension for accessing data for the report from a data source based on query information and data source information in the report definition. The report processor lays out the report in an intermediate format based on layout information in the report definition and the data accessed by the data extension. The report processor also has a rendering extension for rendering the report in a particular rendering format based on the intermediate format of the report.