[Zope] Python classes properties.

[naveen]

Hello,
 I am using python classes to for my Zope product. How do i add one more 
property sheet to my python class.

I add the first one using the following code:

_properties=({'id':'title', 'type': 'string', 'mode': 'w'},
             {'id':'color', 'type': 'string', 'mode': 'w'},
             )

Since i already have about 25 properties on this property. i want to add 
another property sheet as we do in ZOPE ZClass.

naveen