It has 3 fields: QueryString, FileName, and PathName.
- QueryString – is an array of key\value pairs representing the current query string parameters.
- FileName – is a string containing the current name of the current page.
- PathName – is the server relative path of the current page.
I have found no proper documentation for this so I hope it can help.
— My name is Itay Shakury (itaysk) and I am a SharePoint consultant —