Create XSD classes only for first Transformation

[dannodj]

Hi,
I would like to create a set of standard complexTypes in the XSD transform template that are only created if the transform is being run for the first time.  How can I check that the transform hasn't been run before, or alternatively check whether the target package for the transform contains the standard complexTypes?
Do the packageIsFirstNonEmpty or packageHasGenClasses  properties have anything to do with it?
I can't find these properties in the help files,
Thanks.

[Eve]

There is not currently anyway to determine this from the templates.