These parameters can be used to override a web part’s function. To use the parameter, type a question mark at the end of the URL followed by the desired value below (e.g., http://www.company.com/default.aspx?version=coras).
Presents additional error data when an error occurs.
Displays the version of the web part.
Tells the chart to output its current data as XML. Requires OXMLwpname from the Output XML Web Part Name property.
The name or ID of the web part as referenced from the Output XML Web Part Name property.