Make sure you have the spreadsheet window open. (View > Docking Windows > Spreadsheet). At the bottom of each rule slide, all the parameters are listed along with information about what they represent. In the parameters window, you can see the types of values those parameters accept. Examples include: string, Boolean (Yes/No), time, etc. These values are provided by vendor guidelines (e.g., thresholds and voltages set for that specific component or net). HyperLynx DRC can do an automatic electrical sign-off of these areas of your PCB when you input your specific guidelines/parameters.