Salesforce Platform Developer I Certification Guide

Object schema

You have now learned a lot about classes and objects. But what about every single object type in Salesforce? Every object you see in Salesforce (including standard objects, such as account, contact, an Apex class, and an Apex trigger, or custom objects you defined yourself) has properties (fields), methods (which define field values), relationships (master-detail or lookup relations with other objects), and so on. This is what we call the object schema.

If we need some information about the object (such as which fields are visible for a specific user), we can call the object schema via some methods to retrieve this information.