Report Definition Language (RDL) is a Microsoft-standard XML schema for representing reports. The goal of RDL is to promote the interoperability of reporting products by defining a common schema that allows interchange of report definitions. RDL is designed to be output format neutral. This means that reports defined using RDL should be able to be outputted to a variety of formats including Web and print-ready formats or data-focused formats like XML.

The C1RdlReport component was added to Reports for WinForms in the 2010 v3 release to leverage the flexibility of RDL files. Using C1RdlReport, you can easily import RDL files into your reporting applications by adding flexibility and functionality through the use of the familiar format.