Enterprise Portal does not automatically add certain asset types. You can add them by running this script: $SECURITY/samples/management/CreateAssetAndAccessTypes.java.
The script creates these asset types:
X509Cert
System
Server
Database
Browser
Tables
Columns
Methods
Flow
There are a few internal-only asset types that are not added by the script:
AuthorizationInfo
AuthURL
Profiles
Rules
PortalProfileAssetPackage
PortalLogin
AuthService
AuthName
AuthCredential
ManagedObject
You can add these manually by modifying the sample script. Upgrade installations preserve the existence of all of the asset types listed, as well as any asset types you add.