creating tables using Tamino Schema

I am new to XML technology. I want to create multiple tables using Tamino Schema and retrieve the tables and columns from Tamino schema using xquery. Can any one give some example of Tamino schema, which has multiple tables. If I want multiple tables in a schema, I understood that I have to use multiple doctypes in one schema. But how to give multiple doctypes one schema. I am much confused with this. Could any one help me out of this.