A typical permalink is a URL with additional parameters to specify the report to be run, the date range and the output format.
Example:
http://mycompany.com/AirodisReport/JobSubmit.ashx?report=Airodis+Example+Reports%5c1++Knoxfield+Station1%5cLinear+Graph+Example.xml&start=1352393024&end=1352306624&format=png&seq=Page1
Permalinks can have the following parameters: Report, start, end, format, seq (determines which page of a multi page report to be displayed)