A String value that describes the ASPxPivotGrid's contents.
The value of this property is rendered to the summary attribute of the table tag in the resulting markup. This attribute provides a brief description of the table or its purpose on the page.
The contents of the summary attribute are not displayed by a web browser but can be used by search engines or Text-to-Speech browser software.
Note that the summary attribute is not supported in HTML5, and hence, the attribute has no effect when the doctypeMode option is set to DoctypeMode.Html5 in the application's Web.config file.