Implementing a Rendering Extension
A rendering extension is a component or module of a report server that transforms report data and layout information into a device-specific format. SQL Server Reporting Services includes six rendering extensions: HTML, Excel, Word, CSV or Text, XML, Image, and PDF. You can create additional rendering extensions to generate reports in other formats.
To determine which rendering extensions are available, you can view the list of installed extensions in the RSReportServer.config file.