Data Source Types 

Read-Only Data Sources

Data sources that can only be used for read and search operations. The most common example is a corporate LDAP server that contains all the users in a company. In most cases, a company does not want to allow applications like a portal to create, modify or delete users or groups on their corporate LDAP server. In this case, the LDAP server can be configured as read only.

Writeable Data Sources

Data sources that allow create, modify and delete operations.