Hi Marcia,
Unfortunately, there are no options for Transformation scripts for datasets.
Datasets do have a thing known as Trigger Scripts, which have to be used within modules. The functionality of a Trigger Script is slightly different than a Transformation Script though since Transformation Scripts are attached to an assay design and are intended for transformation/validation of incoming assay data while Trigger Scripts are typically uses for altering incoming data or setting off cascading changes in other tables.
Please take a look at our Trigger Script documentation here for more information:
https://www.labkey.org/Documentation/wiki-page.view?name=serverSideValidation
Regards,
Jon