[Zope-dev] ZPatterns: Dataskin property sheets

I'm not as clear as I'd like to be on when to use Dataskin property sheets and when to use common instance property sheets. I understand that with a Dataskin Property Sheet attributes are stored in way that is compatible with attribute providers making overriding of default values possible. If this is the case shouldn't one always use a Dataskin Property Sheet to retain this flexability. Roché