reportViewer开发,Rdl.Report是什么

[elevent]

private Rdl.Report CreateReport()
{
Rdl.Report report = new Rdl.Report();
report.Items = new object[]
{
CreateDataSources(),
CreateBody(),
CreateDataSets(),
"6.5in",
};
report.ItemsElementName = new Rdl.ItemsChoiceType37[]
{
Rdl.ItemsChoiceType37.DataSources,
Rdl.ItemsChoiceType37.Body,
Rdl.ItemsChoiceType37.DataSets,
Rdl.ItemsChoiceType37.Width,
};
return report;
}

这里的Rdl.Report指的是什么呀，有人见过这样的代码吗