Thanks,

but why not blank?

regards

Hi ibox

You can go with blank module also. If you have requirement with mail template for sending mail after create or update logic, then you can go with blank.

If you have requirement with service action, then go with Service module.

But in most real time projects service module is always used for core cs.

Regards

Murali

Although you could use a blank module, service modules help enforce stricter segmentation of modules and to encapsulate core business services, by not allowing the following elements: Interface elements and properties, for example UI flows, Web Screens, Blocks and Images. Module properties for interface, for example JavaScript and Global Event Handler. 

For more information see:

https://success.outsystems.com/documentation/11/developing_an_application/reuse_and_refactor/convert_to_services/