Object Reference for the Salesforce Platform

Overview of Salesforce Objects and Fields
Release Notes
Primitive Data Types
Field Types
API Field Properties
Required Fields
System Fields
Frequently Occurring Fields
Compound Fields
Custom Objects
Custom Fields
AppExchange Object Prefixes and the API
Relationships Among Standard Objects and Fields
Factors that Affect Data Access
Field and Type Differences in Salesforce Apps and APIs
External Objects
Big Objects
Object Interfaces
Reference
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

AppExchange Object Prefixes and the API

If you have an unmanaged package and a managed package version becomes available, the API names of custom fields, custom objects, and Scontrol objects in the package change. A namespace prefix is added to each component to make it unique: name__c becomes prefix__name__c. To move from an unmanaged package to a managed package version of the same application, export your data, uninstall the old package, and install the new package. Then review the name changes and import your data with the relevant mapping. For details, see the ISVforce Guide.