Revit lookup can help to get the built-in parameter member name if you know the parameter name.
After click the "Parameters" property node in the RevitLookup, you can see the button named "Built-in Enums Map..." button. Click this button a dialog shows. Click the Value column to sort the parameter name. Then you can easily found the parameter that you already know its name string. In the right column is the corresponding built-in member.
Joe Ye Developer Technical Services Autodesk Developer Network