Primary assets are the assets that should be imported first to import certain other kind of assets. Primary assets act as the default scope to import the other asset types. The assets that are imported after the primary assets are the secondary assets. Primary assets constitute the super-set of the secondary assets.
For example, in the Control Compliance Suite
In the asset system, Site is the primary asset for all the asset types. When you import the assets of any asset type, you can use the Site as the scope. But, it is not recommended to use the Site as a scope even if it is a supported scope for all the asset types. You are recommended to use the default scopes.
Predefined asset types and primary assets
Asset type
Primary asset
ESM Agents
Site
ESM Agents
Oracle Configured Databases
Site
SQL Databases
SQL Server
UNIX Machine
Site
UNIX Group
UNIX Machine
UNIX File
UNIX Machine
Windows Domain
Site
Windows Machine
Windows Domain
Windows Group
Windows Machine
Windows Directory
Windows Machine
Windows File
Windows Machine
IIS Virtual Directory
Windows Machine
IIS Web Site
Windows Machine
Windows Share
Windows Machine
Administrative Group MS-Exchange
Organization MS-Exchange
Exchange Server
Organization MS-Exchange
Organization MS-Exchange
Site
DB2 Database
Edge Server MS-Exchange
MS-Exchange Administration Groups
SYBASE Servers
VMware ESXi Machines
Site is the primary asset for ESM Agents, Oracle Configured Databases, SQL Servers, UNIX Machine, Windows Domain, and Organization MS-Exchange.