Classes for a domain model

Hello! :slight_smile:

This is my first post here and i’m a total beginner on the subject, so I’m sorry for any mistakes I’ve might have made. :oops:

I’m currently doing a project on a Domain model, making a Domain model for a web based information system.
I’ve found a few Classes, but I’m not sure if they are correct. Since classes in domain models are supposed to be of a representation of a real-situation conceptual class. Not software objects. But since its a web based system isn’t difficult not to include possible classes such as databases and search engines? :?:

Please send me a PM!
Thanks for your help!