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.

Components Available in Unmanaged Packages

Not all components can be packaged for distribution.

Packaged Explicitly or Implicitly

Components can be added either explicitly or implicitly. Explicit components must be included directly in the package, while implicit components are automatically added. For example, if you create a custom field on a standard object, you must explicitly add the custom field to your package. However, if you create a custom object and add a custom field to it, the field is implicitly added to the package when you add the custom object.

Explicitly: The component must be manually added to the package.
Implicitly: The component is automatically added to the package when another dependent component, usually a custom object, is added.

Automatic Renaming

Salesforce can resolve naming conflicts automatically on install.

No: If a naming conflict occurs the install is blocked.
Yes: If a naming conflict occurs Salesforce can optionally change the name of the component being installed.

Component	Packaged Explicitly or Implicitly	Automatic Renaming
Apex Class	Explicitly	No
Apex Sharing Reason	Implicitly On an extension: Explicitly	No
Apex Sharing Recalculation	Implicitly	No
Apex Trigger	On a standard or extension object: Explicitly On an object in the package: Implicitly	No
Application	Explicitly	No
Custom Button or Link	On a standard object: Explicitly On a custom object: Implicitly	No
Custom Field	On a standard object: Explicitly On a custom object: Implicitly	No
Custom Label	Implicitly	No
Custom Object	Explicitly	No
Custom Permission	Implicitly With required custom permissions: Explicitly	No
Custom Report Type	Explicitly	No
Custom Setting	Explicitly	No
Dashboard	Explicitly In a folder: Implicitly	Yes
Document^* (10 MB limit)	Explicitly In a folder: Implicitly	Yes
Email Template (Classic)	Explicitly In a folder: Implicitly	Yes
External Data Source	Explicitly Referenced by an external object: Implicitly Assigned by a permission set: Implicitly	No
Flow Definition	Implicitly	No
Folder	Explicitly	Yes
Home Page Component	Explicitly	No
Home Page Layout	Explicitly	No
Inbound Network Connection	Explicitly	No
Letterhead	Explicitly	Yes
Lightning Application	Explicitly	No
Lightning Component	Explicitly	No
Lightning Event	Explicitly	No
Lightning Interface	Explicitly	No
Lightning Page	Explicitly	No
List View	On a standard object: Explicitly On a custom object: Implicitly	Yes
Named Credential	Explicitly	No
Outbound Network Connection	Explicitly	No
Page Layout	On a standard object: Explicitly On a custom object: Implicitly	No
Record Type	On a standard object: Explicitly On a custom object: Implicitly	No
Report	Explicitly In a folder: Implicitly	Yes
Reporting Snapshot	Explicitly	Yes
S-Control^* (10 MB limit)	Explicitly	No
Static Resource	Explicitly	No
Tab	Explicitly	No
Translation	Explicitly	No
Validation Rule	On a standard object: Explicitly On a custom object: Implicitly	No
Visualforce Component	Explicitly	No
Visualforce Page	Explicitly	No
Workflow Email Alert	Explicitly	No
Workflow Field Update	Explicitly	No
Workflow Outbound Message	Explicitly	No
Workflow Rule	Explicitly	No
Workflow Task	Explicitly	No

^*The combined size of S-Controls and documents must be less than 10 MB.

First-Generation Managed Packaging Developer Guide

Components Available in Unmanaged Packages