Help choosing Script parameter Data Type

Windows 7 Pro SP 1
ArcEditor 10.0
Python 2.6.5

I want to write a python script that acts on tabular data. With that said, the input could be a stand alone table, a feature layer (in the TOC) or a feature class. Is there a parameter data type that would encompass all three? Or should I modify the python validation class...which I've never done before. Any thoughts or suggestions greatly appreciated.

Thanks!