[Zope] How a WebSite works using Zope?

I don't know , then i'm asking this, but is it the way i'm thinking? In your index and other pages you call your zope objects using DTML , it's like that, you create an object in zope that takes some data of your SQL Server DB, and then in your index page, you call that object that takes some data? And then the DATA appears... Another question , is: Is there any DTML editor , and how can i separarate the business logic and the front-end in ZOPE? It's like, i want to make a design , and then i want to integrate it , with my Zope website, and i don't want the codes to be a mass , how can i do it?