Hi Robert,
Adobe campaign standard and classic both use a different format for schema definition. you have to write a custom schema transformer which will transform the classic schema xml into the Adobe campaign standard format.
I would recommend you should define a new data model for standard as this tool works and behaves differently to classic. Create a new schema Data model in a dev environment using UI in Standard and this will be the sure-shot way to ensure that all definition works properly in the standard.
Regards,
Amit